Pikachu

(This creature can't attack or block, and it takes
damage in the form of -1/-1 counters.)
{t}: Pikachu gets {e}.
{1}, {e}{e}, {t} - Thundershock (Pikachu deals 2
damage to target creature or Planeswalker. Flip a coin.
If heads, that permanent doesn't untap during its
controller's next untap step and its activated abilities
can't be activated until it untaps.)