Quilava, Volcanic Rodent

Whenever Quilava takes damage,
it gets +2/+0 until end of turn.
{2}, {t}: Put a +1/+1 counter on Quilava.
{3}{r}: The next time Quilava attacks this turn,
if it is blocked it gains first strike until end of turn. Otherwise, it gains double strike until end of turn.
{5}, {t}: Quilava deals damage equal to its
power to target creature.
{6}{r}, {t}: Quilava deals 5 damage to each creature.