Lamp of Potential.

Lamp of Potential enters the battlefield with X
soul counters on it, where X is the half amount
of life spent to cast it.
Pay 3 life, add a soul counter to Lamp of Potential.
Remove Y soul counters, activate the ability:
1- scry 1, 2- draw a card, 4 -tap/untap target permanent, 5- put a land in your hand onto battlefield, 8- counter target spell or ability that targets you or Lamp of Potential, 24- gain 40 life.