Aron, Iron Armor

Protection from itself
{1}{c}: Aron gains first strike until end of turn.
Put a -1/-1 counter on it.
{3}, {t}: Aron deals 4 damage to target creature
and 4 to itself.
{3}{c}, {t}: Aron deals damage to target creature that damaged it this turn equal to the amount of damage it dealt +1.
{5}{c}, {t}: Aron deals damage to target creature equal to its converted mana cost.