Annihilator

Annihilator is a triggered ability introduced in Rise of the Eldrazi that appears on all the colorless Eldrazi creatures from that set. 
==Description==
“Annihilator N” means “Whenever this creature attacks, defending player sacrifices N permanents.”
Annihilator originally only appeared on colorless Eldrazi creatures, and on a single colorless Eldrazi Aura, <c>Eldrazi Conscription</c>. The mechanic serves two purposes: it helps break the large board stalls that can occur in Rise of the Eldrazi games, and it demonstrates the storyline idea of the Eldrazi as extremely powerful destroyers of planes in an in-game mechanic.
Annihilator is also granted by the <c>Nazgûl Battle-Mace</c> equipment from the Lord of the Rings Holiday Release set.
Its power and design limitation put it high on the Storm Scale, and the return in Battle for Zendikar left it behind as an Eldrazi mechanic in favor of Processors and colorless mana. It got a single callback in , which has an exiling variant. It also reappeared in Modern Horizons 3 and MH3 Commander.
===History===
According to Mark Rosewater, it is unlikely to be reused. It returned however as a one-off mechanic granted by <c>Nazgûl Battle-Mace</c> from the Lord of the Rings Holiday Release.
The Eldrazi returned as a focus for Modern Horizons 3 and brought several new cards with annihilator, including the first Kindred Eldrazi in .
==Rules==
==Rulings==
*The defending player is the player that the creature with annihilator is attacking, or the controller of the planeswalker that the creature with annihilator is attacking.
*Annihilator abilities trigger and resolve during the declare attackers step. The defending player chooses and sacrifices the required number of permanents before they declare blockers. Any creatures sacrificed this way won't be able to block.
*If a creature with annihilator is attacking a planeswalker, and the defending player chooses to sacrifice that planeswalker, the attacking creature continues to attack. It may be blocked. If it isn't blocked, it simply won't deal combat damage to anything.
*In a Two-Headed Giant game, the controller of an attacking creature with annihilator chooses which of the defending players is affected by the ability. Only that player sacrifices permanents. The choice is made as the ability is put on the stack. See rules 810.7 and 805.10e
==Examples==
==Cards that grant Annihilator==
*<c>Azlask, the Swelling Scourge</c> (Spawns and Scions)
*<c>Eldrazi Conscription</c> (Enchanted creature)
*<c>Nazgûl Battle-Mace</c> (Equiped creature)
==External links==
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==References==