When is this card discarded after being used for influence? If I pay for Red Vengeance, does Red Vengeance go to the discard pile before the merchant or after? Thanks!
Starfall Merchant
The short answer is that after Red Vengeance fully resolves, the First Player gets to choose which one goes in the discard pile first. Unfortunately, I'm too tired at the moment to go into much more detail.
Both cards are moribund, so they are placed in discard pile in step 6 (after challenge ends). The owner decides in which order.
Right, I meant owner, not first player. Again, really tired 
Rogue30 said:
Both cards are moribund, so they are placed in discard pile in step 6 (after challenge ends). The owner decides in which order.
Why the owner, I thought that each timing conflict like this was resolved by the first player. I searched the FAQs and didn't find what you say.
zarius said:
Why the owner, I thought that each timing conflict like this was resolved by the first player. I searched the FAQs and didn't find what you say.
Because the owner owns these cards. The first player decides which of the destinations applies for the card's moribund state, but above situation is not conflicting entry. You don't need to decide: dead or discard pile for example.
Rogue30 said:
zarius said:
Why the owner, I thought that each timing conflict like this was resolved by the first player. I searched the FAQs and didn't find what you say.
Because the owner owns these cards. The first player decides which of the destinations applies for the card's moribund state, but above situation is not conflicting entry. You don't need to decide: dead or discard pile for example.
To further clarify, suppose Threat from the North is revealed and I am defending a challenge with two 1 STR characters (printed 2 STR reduced to a modified STR of 1). My opponent, the first player, is attacking with a Dragon character and plays The Dragon's Fire. This will reduce my two defending characters STR to zero, and will create simultaneous but conflicting entry into the state of moribund (both Threat's discard and Dragon's Fire kill effect happen at the same time). Since my opponent is the first player, he or she will decide which of my two characters will be sent to the discard pile and which will be sent to the dead. Let's suppose my opponent decides that he wants them killed and to be put in my dead pile. Once they leave play in Step 6 they must go to my dead pile, but since I own the two characters I get to choose the order they enter my dead pile.
As Rogue30 said, the first player decides the destination of cards (for conflicting entry into the moribund states), but the owner will always decide the order their cards leave play in Step 6 of the action window.
zarius said:
Why the owner, I thought that each timing conflict like this was resolved by the first player. I searched the FAQs and didn't find what you say.
The parallel example is the Standing phase. All cards stand at the same time, but the controller ends up turning them in some practical order. The First Player does not get to decide the order in which cards stand, even though all cards stand at the same time, because it is not considered a timing conflict