Is Yorvo, Lord of Garenbrig's power when it enters the battlefield 0 or 4? If you had an Experiment One on the field, and you played Yorvo, would you put a +1/+1 counter on Experiment One?
If you play Pact of Negation and win the game before your next upkeep, but would have been unable to pay the 3{U}{U} mana cost at the beginning of your next upkeep, do you still win?
Scenario 1: If Valakut, the Molten Pinnacle is in play and 5 mountains enter the battlefield at the same time, can Valakut deal 3 damage for each of those mountains?
Scenario 2: If Valakut enters the battlefield at the same time as 5 other mountains, how much damage can you have Valakut deal?
Scenario 1: If Valakut, the Molten Pinnacle is in play and 5 mountains enter the battlefield at the same time, can Valakut deal 3 damage for each of those mountains?
Scenario 2: If Valakut enters the battlefield at the same time as 5 other mountains, how much damage can you have Valakut deal?
(that converted mana cost being one).