Invasion of Tarkir // Defiant Thundermaw

Invasion of Tarkir’s enters-the-battlefield ability triggers and goes on the stack without a target. As it resolves, you’ll reveal any number of Dragon cards from your hand. As the card reminds you, that number can be zero. Then the second “reflexive” triggered ability will trigger. You’ll choose the target for that second ability at that time.

2023-04-14

As a Siege enters the battlefield, its controller chooses an opponent to be its protector.

2023-04-14

If a Siege never had defense counters on it (perhaps because a permanent became a copy of one), it can’t have its last defense counter removed. It will be put into its owner’s graveyard. You won’t exile it or cast the other face.

2023-04-14

Damage dealt to a battle causes that many defense counters to be removed from it.

2023-04-14