Thundaga

Kicker {r}{r}{r}{r}{r} (You may pay an additional {r}{r}{r}{r}{r} as you cast this spell.)
Kicker {2}{r}{r}{r}{r} (You may pay an additional {2}{r}{r}{r}{r} as you cast this spell.)
Deals 5 damage to two targets creature.
• If Kicked w/ {r}{r}{r}{r}{r}, second two target
creatures also take 5 damage.
• If Kicked w/ {2}{r}{r}{r}{r}, target two opponents
also take 5 damage, or one opponent takes 10.