Lairon, Iron Clad

Lairon can't be returned to your hand.
{2}{r}, {t}: Lairon deals 3 damage to target creature.
{2}{c}: Lairon gets +0/+4 until end of turn.
{3}{c}, {t}: Lairon deals 2 damage to target creature. Flip a coin. If you win the flip,
put two -1/-1 counters on it.
{5}, {t}: Prevent all damage that would
be dealt to Lairon until end of turn.