穿心弓

Text:

每当佩带此武具的生物攻击时，穿心弓对目标由防御牌手操控的生物造成1点伤害。
佩带（：装备在目标由你操控的生物上。佩带的时机视同法术。）

Rulings:

• 7/12/2019 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.
• 7/12/2019 If a creature is attacking a planeswalker, the controller of that planeswalker is the defending player.