Madma said:"Select 1 monster on your side of the field to activate this card. Destroy the selected card and send 2 cards from the top of your opponent's Deck to the Graveyard."
Looks like to destroy a monster isn't a activation cost, but is an effect, right?
YesDoes "Tribe" still get destroyed?
No, it is a non-continuous card.Does "Assault on GHQ" have to remain on the field until it completely resolves in order for it's effect to be successful?
It isn't an activation cost. An activation cost would be like Premature Burial, Confiscation, Solemn Judgment, Horn of Heaven, Magic Jammer, etc.. You discard at activation to get the effect. Assault on GHQ does no such thing.StRiKe_NiNjA said:It is an effect, selecting the monster is the only activation cost.
However, to fullfill the requirement, you must destroy the monster through the effect to correctly resolve this effect.