Vengeful Strangler
Creature — Human Rogue
Vengeful Strangler can't block. When Vengeful Strangler dies, return it to the battlefield transformed under your control attached to target creature or planeswalker an opponent controls.
Strangling Grasp
Enchantment — Aura
Enchant creature or planeswalker an opponent controls At the beginning of your upkeep, enchanted permanent's controller sacrifices a nonland permanent, then that player loses 1 life.