Kerblam! Warehouse
From Doctor Who set
Kerblam! Warehouse
Plane — Kandoka
Whenever one or more creatures you control deal combat damage to a player, create a Treasure token.
Whenever chaos ensues, until your next turn, noncreature artifacts you control gain " , Sacrifice this artifact: Flip a coin. If you win the flip, this artifact deals 3 damage to any target."
Rulings
- You choose a target for the activated ability before flipping a coin. Opponents will know what or who you are targeting before you flip, and can respond with spells and abilities at that point. They can't respond once the ability has begun to resolve and they see what the result of the coin flip is.