Basilisk Collar

Artifact — Equipment

Equipped creature has deathtouch and lifelink. (Any amount of damage it deals to a creature is enough to destroy it. Damage dealt by this creature also causes you to gain that much life.)
Equip ( : Attach to target creature you control. Equip only as a sorcery.)

During their endless travels, the mages of the Goma Fada caravan have learned ways to harness both life and death.