to make my army fluffy at the club i play they allowed me to do these 3 things
1: any aspiring champion with a power weapon may become an aspiring sorcerer and given mastery level 1 and a force weapon for 25pts (it must have the mark of tzeench)
2: +10pts a model each single wound model gains inferno bolts and aura of dark glory but all models must take it if one of them are going to take it and you must pay for mark of tzeench
3: for +40pts a unit of 5 chosen that have a power weapon each gains the brother hood of sorcerers and force weapons
this is just to make the army fluffy (my group allow other people to do similar things providing its not over the top and connects with fluff)
army list:
sorcerer, allure of dark glory, mastery level 3, spell familiar 155pts
5 terminators, aspiring sorcerer, inferno bolts, 4 power fists, mark of tzeench(i believe
mot is 6pts/per model) 262
5 chosen, 5 power weapons, brother hood of sorcerers, mark of tzeench ( i think its 5pts/per model), inferno bolts and aura of dark glory, rhino 315
thousand sons, 4 extra thousand sons 242
thousand sons, 5 extra thousand sons 263
warp talons, mark of tzeench 190
predator, twin linked las cannon, side sponsons las cannon 165
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