心臓追いの短剣 (Heartseeker) (ja)
Artifact - Equipment
(CMC 4)
Equipped creature gets +2/+1 and has ", Unattach Heartseeker: Destroy target creature."
Equip (: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)