Howdy folks; let me tell you all a little story about how my Nurgle themed list with a Biker Bomb absolutely massacred a scary Deathwing/Ravenwing Dark Angel force.
I'll start off by introducing the lists.
My List..............................................................................................................................
His List
Chaos Lord, Black Mace, Sigil of Corruption, Bike, Mark of Nurgle.................................Interrogator Chaplain, terminator armor, auspex
Sorcerer,
ML 2, Bike, Mark of Nurgle, Force Axe.............................................................Deathwing Knights x 5
Bikers x 7, Mark of Nurgle, Melta gun x 2, Melta bombs..................................................Deathwing Command Squad x 5, Company banner, Thunder hammer & Storm shield, Apothecary, ..........................................................................................................................................Champion,
Plague Marines x 6, Plasma gun x 2, Rhino, Havoc Launcher.........................................Ravenwing Bike Squad x 6, Attack Bike, Power Sword, Melta gun
X2
Obliterators x 3, Mark of Nurgle........................................................................................Land Speeder, Heavy Bolter x 2
Predator, sponson laz, twin linked laz, havoc launcher, combi bolter................................Tactical Squad x 10, Missile Launcher, Plasma gun, Combi Plasma
x2
...........................................................................................................................................Tactical Squad x 10, Rhino, Missile Launcher, Hunter Killer Missile, Flamer
............................................................................................................................................Tactical Squad x 5, Melta gun
............................................................................................................................................Devastator Squad x 5, Laz cannon x 2
My sorcerer rolled 'gift of contagion' & 'life leach' (biomancy)
My lord's warlord trait was +1" to run & charge distance to all friendlies within 12"............His was precision shots & ignores cover for shooting.
His Knights, Command Squad with Chaplain, and Land Speeder are all held in reserve.
The Game.
We roll for game, and get The Relic. We roll for table halves, & I win. We roll for deployment & again I win, choosing to deploy first.
I apologize for not taking pictures, this paint lay-out should give you the layout of things.

After finishing this post, I'm not sure why this picture isn't showing up right. Ah well, hopefully the battle description gives you a good idea where things are.
The black dots on the north are marines.
The north east dots are devastators, with tacticals to their west.
The black lines are ravenwing.
The red dots, (and green) signify special weapons, and the purple dots signify seargents.
The large un colored boxes are rhinos, and the small box is the attack bike.
The black lines in the south are also bikers, the red being special weapons, the purple being a seargent, the orange being the lord & the blue being the sorcerer.
The black circles in the brown circle are obliterators
The black boxes with lines sticking out are the predators
The cluster of grey circles is the "Crashed Imperial Aquila Lander"
The black circles are giant pillars.
The brown circles are rock ridges
The squiggly lines are pieces of the "Aegis Defense Line"
The cyan boxes are buildings
The green circle and its immediate surroundings are Nurgle Themed trees / bushes
The blue circle in the middle is a pond with some trees attached.
The yellow line is the relic.
Not pictured are a 5 man tactical squad with a missile launcher on the north west rock ridge.
His bikers scout move 12" forward, and split into two 3 man squads, one going left and one going right around the pond.
Turn 1
I start off by moving towards the relic 6" with my rhinos while my biker bomb speeds ahead 12". Everything else holds position.
My sorcerer casts gift of contagion on the devastators right in front of him, & with much regret gives them shrouded and -1 attack... They now have 2+ cover. Life leach sucks the soul from a biker.
Both my rhinos open fire on the biker squad closest to them with their plasma guns & havoc launcher. With his 4+ re roll jink, he loses nothing; while one of my plague marines dies from a 'gets hot'.
The obliterators fire assault cannons at the bikes on the left as well, managing to pick off another biker.
Both predators unload everything into the devastators, & despite their incredible new found cover save, two go down. Including a lazcannon.
The bikers fire at the remaining devastators and kill another marine.
The devastators & bike squad with a sergeant hold their ground while the special weapon bikers fall back, coming within 1" of the table edge. So close to first blood!
His special weapon bikers auto regroup and zoom back towards the sacred relic, while his biker sergeant squad claims the relic.
His attack bike breaks off from the rest & flanks my bikers from a reasonable distance, but unable to wound my beastly bikers.
The missile launcher on the ridge pens the closest rhino, shaking it. The fearless plague marines are undaunted.
The tactical squad behind the bikes moves up, firing the plasma gun and combi plasma at the pen'd rhino, missing horribly.
The tactical squad beside the devastators moves around the pillars and fires on the approaching bikes, but their weapons are no match for T6 bikers.
The devastators on the other hand, blow a biker to smithereens with their remaining laz cannon.
The rhino moves flat out up the flank towards my closest rhino.
Turn 2
My bikers come within spitting distance of the tacticals and remaining devastators,
The sorcerer casts gift of contagion on the sergeant's bike squad, giving them -1S and preventing them from running. He again sucks the life from a helpless marine infront of him.
The predators again unleash hell on the devastator squad, killing another two marines, and catching a tactical with a lucky blast.
While the rhino's repeat their previous maneuver of a slow advance while firing all they can, they kill the sergent biker's squad, dropping the relic.
The obliterators fire laz cannons at the attack bike, un able to wound through the attack bikes jinking skills.
The bikers unload on the tacticals, killing off all but two. The squad holds its ground, & the bikes dis orderly charge the tacticals and devastators. The daemon weapon grants 6 extra attacks to my lord, and between the mass of attacks and Black Mace's Curse, wipes out the two squads single handedly. Being toughness 6 the bikes all auto pass the Curse' toughness test. First blood belongs to Chaos!
They consolidate south of the nearby pillar.
He begins by calling in his Deathwing Knights, with the help of the special weapon bike squad's homer beacon, they arrive mere inches from my encroaching rhinos, & right ontop of the relic.
His land speeder is deep striked directly north of the pond, firing upon the obliterators on the ridge, but unable to pierce their flesh metal.
His special weapons bike squad attempts to melta my rhino on the left, missing.
The attack bike retreats, spinning around to again fire at my bikes, unable to hit or kill any.
His rhino moves forward a little and disembarks two combat squads, the flamer to the south and the missile launcher to the north. The missile squad takes position in the open, while the flamer squad runs towards the rhino. It then fires its hunter killer missile into the rhino, glancing off another hull point.
The tactical squad moves up and again fires its plasma gun at the wounded rhino, this time unable to hurt it.
The missile launcher on the ridge however, wrecks it, right in front of the leftmost pillar. The fearless plague marines pile out between the two pillars.
Turn 3
The sorcerer attempt to give the gift of contagion to the knights, but my opponent denys it. Life leach is then cast at them, but fails to pierce their storm shields.
The predator on the left moves to the left slightly to get a shot on the knights, but the position readjustment causes a complete miss on all weapons.
The predator on the right fires on the attack bike, failing miserably to wound.
The in tact rhino crawls back from the knights, dis embarking the plagues within rapid fire range.
Between both plague marine squads, & the remaining rhino, they kill off 2 knights.
The obliterators unload plasma cannons on the knights, scoring all direct hits. The knight emerge from the fire with only two left; their shield wall is broken!
The bikes fire their bolters & meltas at the land speeder, reducing it to a single hull point. The ensuing charge leaves the speeder a wreck, and the bikes consolidate towards the relic holding knights.
His Deathwing Command squad comes in, using the attack bike's homing beacon. The Terminators now block the bikes from getting to the knights. They fire on the chaos bikers but cannot wound them.
The attack bike, with maneuvers that would make the Khan proud, flies from the approaching bikes and with a miraculous stroke, kills a biker with a snap shot.
Two tactical squads move up, and the remaining 4 tactical squads, bikers, plus rhino, fire everything they have upon the two plague marine squads. Nurgle saves, however. The plagues eat up the armor penetrated wounds with feel no pain.
Finally, the two knights evacuate the relic towards the mass of tacticals to the west. Alas, the relic encumbers them, and their escape is not swift enough.
Turn 4
The western predator fires with full ballistics skill on the knights, firing a deadly laz shot which was intercepted by the captain's last loyal squad mate.
The invincible plague marines move as fast as they can towards the lonely Knight Captain holding the relic. The closest squad holds fire as the furthest unleashed searing plasma. It is too much. The knight goes down, and with him, the relic! With a surge of speed the closest plagues run to scoop it up. The plague champion now holds the relic, surrounded on all sides by his squad.
The warp is strong this turn, the sorcerer can feel it. He begins his spell casting with gift of contagion on the command squad. Unable to deny the spell, the resulting contagion saps -1s and -1t from the unit. Nurgle's final blessing this match. Once again the sorcerer attempts life leach, but cannot pierce the closest terminator's thunder shield. Finally, he empowers his force axe.
The obliterators; firing their assault cannons; the eastern predator, & the remaining bikes fire all guns on the command squad. Despite their loss of toughness, only the captain & thunderhammer stormshield terminator go down under the storm of gun fire. The assault that followed would be the nail in the coffin for the Dark Angels. After the hammer of wrath, the Chaos Lord again rolls a 6 for his daemon weapon, bringing him to a staggering 10 attacks! The lord's brutal assault manages to kill the banner bearing terminator, once again activating the Black Mace's Curse. With a toughness of 3, the apothecary easily fail his test and succumbs. Not wanting a scratch on my
HQs, my biker champion and his deathwing champion engage in honorable combat, but are unable to wound each other. The mass of biker attacks manages to shave a single wound off his Interrogator Chaplain, who had crushed a biker just seconds before. Now it was the Sorcerer's turn to strike. With his four attacks, he manages to get two wounds, one of which is not saved by the Chaplain's armour, instantly killing the poor Interrogator.
With possession of the relic lost, & his warlord dead, my opponent admits defeat. Crushing Victory for Chaos!!