The List

Canopy Surge

Kicker {2} (You may pay an additional {2} as you cast this spell.)
Canopy Surge deals 1 damage to each creature with flying and each player. If this spell was kicked, it deals 4 damage to each creature with flying and each player instead.

Invasion

Kicker o2 (You may pay an additional o2 as you play this spell.)
Canopy Surge deals 1 damage to each creature with flying and each player. If you paid the kicker cost, Canopy Surge deals 4 damage to each creature with flying and each player instead.