Izaal, Mind-Shattered

Shadow, First Strike, Ingest
When this card is targeted by a spell, counter that spell, then place a shade counter on Izaal, Mind-Shattered, then deal 2 damage to the countered spell's controller. If it's a blue spell, deal 4 damage instead.
During your end step, you may choose to remove all shave counters from Izaal, Mind-Shattered. If you do, exile it and return it to the battlefield transformed under its owner's control.