I am thinking of building a discard deck and was looking for some clarification on a interaction that might pop up with "may" effects. I would like to know exactly when I need to decided whether or not a "may" effect is going to happen. An example for when this would make a difference...
On my side of the board I have:
In my hand I have:
And on top of my library is (but I don't know that yet):
My opponent has nothing on the board, and several cards in his hand including the Sorcery Lava Axe.
My plan is to cast Duress on my opponent and have him discard Lava Axe. It is my understanding that both the Waste Not and Geth's Grimoire triggers would go on the stack simultaneously, allowing me to choose which one resolves first.
Is it possible to resolve Waste Not first, draw a card, see Dark Deal and then decide not to draw a card off Geth's Grimoire's trigger? Or do I need to choose whether or not to draw a card for Grimoire before I see the result of the Waste Not draw?
This would be advantageous to me since I could then cast Dark Deal without having to discard the card I drew off of Geth's Grimoire, and reap whatever benefits from Waste Not and Geth's Grimoire from my opponent's discarded hand.