It doesn't really specify, do you need to discard 2 attacks in a single turn or can you play this attack as long as you have discarded at least 2 attacks from your card pool anytime during the game?

the current ruling on this, i believe, is that the game only remembers what you do in the turn your on so even if it tried to look back it sees nothing.

It's in a single turn. Game state memory won't keep that information over multiple turns unless a card specifically requests it ("This attack gets +X damage, X equals the number of attacks you discarded from your card pool last turn".. such an ability will likely never be made, however, since it'd add a need for tracking another number which oftentimes wouldn't be needed for anything).

Are you still required to discard 2 attacks if you wan't to play this card as a block?

Yes, you must still have discarded that two attacks in order to play this card as a block.

yes.

also wan't