Thunder

Kicker {r} (You may pay an additional {r} as you
cast this spell.)
Kicker {r}{r} (You may pay an additional {r}{r} as
you cast this spell.)
Deals 3 damage to target creature.
• If Kicked with {r}, second target creature also
takes 3 damage.
• If Kicked with {r}{r}, target opponent also takes
3 damage.