Thresh, Chain Warden

Challenger (When Thresh, Chain Warden declares an attack, you can choose an enemy creature on the battlefield to strike, by dragging them into the blocking position.)

Whenever another creature you control or Thresh kills in combat dies, gain a Soul counter equal to the deceased's power.

At the beginning of your end step, choose target creature card(s) in your graveyard. You may discard Souls equal to the selected card(s) mana value to return it to the battlefield