Neko-Te
{3}
Artifact -- Equipment
Whenever equipped creature deals damage to a creature, tap that creature. That creature doesn't untap during its controller's untap step for as long as ~this~ remains on the battlefield.
Whenever equipped creature deals damage to a player, that player loses 1 life.
Equip {2}
Sword of Kaldra
{4}
Legendary Artifact -- Equipment
Equipped creature gets +5/+5.
Whenever equipped creature deals damage to a creature, exile that creature. (Exile it only if it's still on the battlefield.)
Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery. ~this~ enters unattached and stays on the battlefield if the creature leaves.)