So at some point this i likely to come up in an EDH game with my friends. On the board are Perplexing Chimera and Possibility Storm. Someone casts a spell. At what point does Perplexing Chimera's ability activate? Before the original spell gets exiled, or when the new spell has been chosen? Technically you are casting both, right? Can an opponent steal a card with Perplexing Chimaera and then search their own deck? It'll be a hectic game, I know.
Perplexing Chimera’s ability triggers any time an opponent casts a spell. So it will trigger on both spells, the one originally cast and the one cast off the Possibility Storm. However, you probably don’t want to gain control of the first spell because it’s going to go away due to possibility storm and your opponent will still get to cast the spell off of the Storm.
You should probably just steal the second spell, the one that is cast off the Possibility Storm.
I do want to add one thing. The original question did ask if you could steal a spell and search your own deck. This will not work because Possibility Storm specifically says that the card must be cast from a player’s hand. When Chimera takes control of the spell, it won’t have come from a player’s hand at that point so Possibility Storm won’t care.
you have jace
Garruk and Liliana
Gideon and Chandra
This is my favorite post on Tumblr. Although Venser was a low blow.
I think this is one of the few posts that’s actually made better by Tumblr mobile because you have no way of knowing what’s coming next.