Jet, Insect Exterminator

Protection from insects
At the beginning of combat on your turn,
a creature you control with the highest
power among creatures you gets +1/+2
until end of turn, then put a -1/-1 counter
on target creature an opponent controls.
{1}{w}{r}, {t}: Jet, Insect Exterminator deals 3 damage to any target. You gain 3 life.