Commander : Invoke Prejudice + Knowledge Pool Interaction
Asked by GorehoundABB 8 years ago
In a very stupid Commander game I managed to get out both Invoke Prejudice and Knowledge Pool. My playgroup didn't know what to make of it and nether did I.
How does this interaction work?
I figure the first spell exiles into Pool first but since Invoke Prejudice doesn't check for resolution only cast. If the spell is a creature does it mean that my opponent still has to pay the mana for the first spell?
I understand the second half of the interaction where Knowledge Pool allows any player to cast something for free from under pool, if it is a creature they have to pay the mana met under the conditions of my current board state.
So what exactly happens in the first half? Does the Invoke Prejudice trigger fizzle as there is no spell on the stack?
RicketyEng says... #2
Also note that when you have Invoke Prejudice resolve before Knowledge Pool and the spell is successfully countered before Pool resolves, then the spell will not be on the stack for Pool to grab and the player won't get to cast something else from the Pool.
Either way, stacking the two triggers such that Prejudice resolves first is the only way it will get to interact with the originally cast spell. If Pool resolves first then the original spell will no longer be on the stack when Prejudice resolves (the ability doesn't actually fizzle since it doesn't target, but there isn't much incentive to pay to prevent a nonexistent spell from being countered). However in the meantime, Prejudice may trigger for the spell cast from the Pool which, as you said, is pretty straightforward.
GearNoir says... Accepted answer #1
As I understand it, because both cards check upon cast, when priority is passed to you after an opponent casts (APNAP order), you choose the order they go on the stack (remember "Last In, First Out").
In a super competitive game, you would likely want to stack it with Pool on the bottom and Prejudice on top so they pay the extra cost first and possibly even a second time (if Pool no longer contains cards that share colors with your creatures). This will help you protect your own cards that are exiled with Pool from being cast by opponents.
January 16, 2017 1:54 p.m.