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Hello, all.

Short time reader, first time poster. I wanted to submit this question to the Dakka Dakka hive mind.


Do I have to declare that reserves are arriving through the tunnel created by subterranean assault?
Which could cause, (I am guessing), the unites to be destroyed if the Trygon or Trygon Prime did not arrive.

No. A unit can choose to arrive through the tunnel instead of arriving normally each turn. The alternative would cause problems if two or more such units would arrive on the same turn.

"If units in reserve have the 'deep strike', 'scout' or 'infiltrate' special rule, the player must declare to his opponent, during army deployment, whether they are going to use their special rules to deep strike/outflank or they are going to enter from his own table edge when they will become available... This decision may not be changed later."

So by my reading, only units with those special rules have to declare, and they would be unable to come in through the tunnel anyway, because that would technically be a change of the decision.

The only unit it really applies to is Genestealers though.

Any models without those special rules are free to arrive from either your board edge or the Trygon tunnel without informing your opponent.

Thanks for the reply.
It is the reserve rule that you quote that caused me to post the question, because under the rule for subterranean assault it states, "Any Tyranid infantry units (excluding those with wings) that arrive from reserve in subsequent turns may attempt to utilise this tunnel network and emerge form it instead of arriving as normal."

So, is "normal" how you declared them to come on, or, is "normal" walking on from board edge?

'Normal' is the default reserve rule - entering play from your board edge.

Anything needs another special rule, and can't be considered normal.

I can see either interpretation being a valid read of the rules. Something worth clarifying pre-game for sure though.

Neither reading is abusive enough to stand out as an issue, so I'd personally be inclined to let the Tyranid player do it either way till its better defined (via FAQ).

Jack

BRB p94, Arriving From Reserves - When a reserve unit arrives, it must move onto the table from the controlling player's table edge (unless it's deep striking or outflanking).

Deep Strike and Outflank are exceptions from the normal method. Trygons can't change the arrival method of those units.

See my FAQ for the answer and more!

TYR.50.01 – Q: Can models arriving from reserve via Deep Strike opt to arrive via “Subterranean Assault” instead?
A: Yes, though remember that models with Wings still cannot use it. [Clarification]
• It can, however, be interpreted that the use of “instead of arriving as normal” precludes its use by Deep Striking units.

The rule says to place a marker and you can deploy within 6" of marker. Is there a standard size for this or is it considered the size of the base of the creature which I think is 5" by 3". Also as the base is not round if its the same size the oriantation is how it came out and stays that way.

Or are the talking about the 3" blast marker?

As it might be the difference between a 17" by 15" oval and if small creature base of 1" it would be a 13" by 13" area.

The marker is the size of a Trygon base. I'd suggest making a suitable crater based on plasticard if you plan on using the Trygon hole.

Do I have to declare that reserves are arriving through the tunnel created by subterranean assault?
Which could cause, (I am guessing), the unites to be destroyed if the Trygon or Trygon Prime did not arrive.

This would never occur as you can't arrive through the tunnel until a turn after the Trygon has arrived...

The tunnel has to be there at the start of your turn to be used in effect, so whether you declare then or as they arrive doesn;t make any difference.

Unless you are asking if you have to declare before the game starts like for DSing units in which case no you don't.

It does say "instead of arriving as normal" which I take to mean you choose to try it when the tunnel is available.

edit: provided, ofc, that you're not already waiting to arrive by some other special form of reserve deployment such as deepstrike

Unless you are asking if you have to declare before the game starts like for DSing units in which case no you don't.

Yep, that is what I was referring to.

The rule says to place a marker and you can deploy within 6" of marker. Is there a standard size for this or is it considered the size of the base of the creature which I think is 5" by 3". Also as the base is not round if its the same size the oriantation is how it came out and stays that way.

I would think that the hole would be the same size, shape and orientation of the base. Since it would seem kinda weird to have a Trygon bursting out of the ground from a hole smaller than it self.