Grima, the Fell Dragon

Shroud (This creature can't be the target of spells or abilities)

Grima, the Fell Dragon enters the battlefield with 20 time counters. For each extra mana used to cast Grima, the Fell Dragon, remove 1 time counter. At the beginning of your upkeep, remove 1 time counter. If there are no time counters on Grima, the Fell Dragon, you win the game.