Keyword: Kicker

Kicker and/or (You may pay an additional and/or as you cast this spell.)
When Thornscape Battlemage enters the battlefield, if it was kicked with its kicker, it deals 2 damage to any target.
When Thornscape Battlemage enters the battlefield, if it was kicked with its kicker, destroy target artifact.

Kicker (You may pay an additional as you cast this spell.)
Untap target creature. It gets +2/+2 until end of turn. If this spell was kicked, that creature gets +4/+4 until end of turn instead.

Kicker (You may pay an additional as you cast this spell.)
Haste
When Keldon Overseer enters the battlefield, if it was kicked, gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn.

Kicker (You may pay an additional as you cast this spell.)
Burst Lightning deals 2 damage to any target. If this spell was kicked, it deals 4 damage instead.

Kicker (You may pay an additional as you cast this spell.)
Create two 1/1 green Saproling creature tokens. If this spell was kicked, create four of those tokens instead.

Kicker (You may pay an additional as you cast this spell.)
When Excavation Elephant enters the battlefield, if it was kicked, return target artifact card from your graveyard to your hand.

Kicker (You may pay an additional as you cast this spell.)
Destroy target artifact or enchantment. If this spell was kicked, draw two cards.

Kicker (You may pay an additional as you cast this spell.)
When Citanul Woodreaders enters the battlefield, if it was kicked, draw two cards.

Kicker (You may pay an additional as you cast this spell.)
This spell can’t be countered.
Urza’s Rage deals 3 damage to any target. If this spell was kicked, instead it deals 10 damage to that permanent or player and the damage can’t be prevented.

Kicker (You may pay an additional as you cast this spell.)
Counter target spell if its converted mana cost is 2 or less. If this spell was kicked, counter that spell if its converted mana cost is 4 or less instead.

Kicker (You may pay an additional as you cast this spell.)
This spell can’t be countered.
Urza’s Rage deals 3 damage to any target. If this spell was kicked, instead it deals 10 damage to that permanent or player and the damage can’t be prevented.

Kicker (You may pay an additional as you cast this spell.)
Destroy target artifact or enchantment. If this spell was kicked, draw two cards.

Kicker (You may pay an additional as you cast this spell.)
Return target nonland permanent to its owner’s hand. If this spell was kicked, draw a card.

Kicker (You may pay an additional as you cast this spell.)
Destroy target artifact or enchantment. If this spell was kicked, draw two cards.

Kicker (You may pay an additional as you cast this spell.)
Search your library for up to two Forest cards, put them onto the battlefield tapped, then shuffle your library.
If this spell was kicked, untap all Forests put onto the battlefield this way. They become 3/3 green creatures with haste that are still lands.

Kicker (You may pay an additional as you cast this spell.)
Breath of Darigaaz deals 1 damage to each creature without flying and each player. If this spell was kicked, it deals 4 damage to each creature without flying and each player instead.

Kicker (You may pay an additional as you cast this spell.)
Destroy target artifact or enchantment. If this spell was kicked, it deals damage equal to that permanent’s converted mana cost to target creature.

Kicker (You may pay an additional as you cast this spell.)
When Desolation Giant enters the battlefield, destroy all other creatures you control. If it was kicked, destroy all other creatures instead.

Kicker (You may pay an additional as you cast this spell.)
Shivan Fire deals 2 damage to target creature. If this spell was kicked, it deals 4 damage instead.

Kicker (You may pay an additional as you cast this spell.)
When Sergeant-at-Arms enters the battlefield, if it was kicked, create two 1/1 white Soldier creature tokens.

Kicker (You may pay an additional as you cast this spell.)
When Ghitu Chronicler enters the battlefield, if it was kicked, return target instant or sorcery card from your graveyard to your hand.

Kicker (You may pay an additional as you cast this spell.)
Fight with Fire deals 5 damage to target creature. If this spell was kicked, it deals 10 damage divided as you choose among any number of targets instead. (Those targets can include players and planeswalkers.)

Kicker (You may pay an additional as you cast this spell.)
Trample, haste
At the beginning of the end step, if Skizzik wasn’t kicked, sacrifice it.

Kicker (You may pay an additional as you cast this spell.)
If Baloth Gorger was kicked, it enters the battlefield with three +1/+1 counters on it.

Kicker (You may pay an additional as you cast this spell.)
When Slinn Voda, the Rising Deep enters the battlefield, if it was kicked, return all creatures to their owners’ hands except for Merfolk, Krakens, Leviathans, Octopuses, and Serpents.