마법물체 — 장비
장착된 생물이 공격할 때마다, 수비플레이어가 조종하는 생물을 목표로 정한다. 심장을 관통하는 활은 그 목표에 피해 1점을 입힌다.
장착

Heart-Piercer Bow (not the equipped creature) is the source of the triggered ability and the source of the damage. This means that a creature with protection from green may be targeted even if Heart-Piercer Bow is equipped to a green creature, but a creature with protection from artifacts may not.
If a creature is attacking a planeswalker, the controller of that planeswalker is the defending player. If a creature is attacking a battle, the protector of that battle is the defending player.