Primordial Shockwurm

Primordial Shockwurm can't be countered.
Reveal the first card you draw each turn. If the revealed card is a nonland card with converted mana cost less than or equal to Primordial Shockwurm's power, put two +1/+1 counters on Primordial Shockwurm and it deals 2 damage to target creature or player. If the revealed card is a land card, draw a card.