Annihilator is a keyword ability.
When a creature with annihilator attacks, it forces its opponent to sacrifice a specified number of their Permanents currently in play.
- Annihilator 2 (Every time this creature attacks, defending player sacrifices two permanents.)
- 702.85a Annihilator is a triggered ability. “Annihilator N” means “Whenever this creature attacks, defending player sacrifices N permanents.”
- 702.85b If a creature has multiple instances of annihilator, each triggers separately.