Hollow Warrior

{4} · Artifact Creature — Golem Warrior

This creature can't attack or block unless you tap an untapped creature you control not declared as an attacking or blocking creature this combat. (This cost is paid as attackers or blockers are declared.)

Motor: se resuelve a mano

Rulings (1)

This card can’t tap itself to allow itself to attack or block. You have to tap a different creature which is not being declared as an attacker or blocker.
Wizards of the Coast · 2004-10-04