First strike

Ballynock Cohort gets +1/+1 as long as you control another white creature.

Kithkin spells and Soldier spells you cast cost less to cast.

+1: Until end of turn, Gideon, Ally of Zendikar becomes a 5/5 Human Soldier Ally creature with indestructible that's still a planeswalker. Prevent all damage that would be dealt to him this turn.

0: Create a 2/2 white Knight Ally creature token.

−4: You get an emblem with "Creatures you control get +1/+1."

More Than Meets the Eye (You may cast this card converted for .)

Prevent all combat damage that would be dealt to attacking Humans you control.

Whenever you cast your second spell each turn, convert Goldbug.

Art rampage 2 (Whenever this creature becomes blocked by a creature, it gets +2/+2 for each creature in the blocker's art beyond the first.)

Menace

If you would flip a coin, you may instead roll a d20. 1−10 is tails and 11−20 is heads. (It counts as rolling a die, not flipping a coin.)

If you would roll a d20, you may instead flip a coin. Tails is 1 and heads is 20. (It counts as flipping a coin, not rolling a die.)

Create two 1/1 white Human Soldier creature tokens. Humans you control gain haste until end of turn.

Target creature gets +2/+0 and gains first strike until end of turn. Up to one other target creature gets +0/+2 and gains lifelink until end of turn.

Return each creature card with mana value X or less from your graveyard to the battlefield. Exile those creatures at the beginning of your next upkeep. Exile Rally the Ancestors.

Create a token that's a copy of target creature you control.

Conspire (As you cast this spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it and you may choose a new target for the copy.)

Creatures you control get +2/+0 until end of turn.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Radiance — Untap target creature and each other creature that shares a color with it. Those creatures get +2/+0 until end of turn.

Creatures you control get +1/+3 until end of turn. Untap them.

If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost.

Creatures you control get +1/+1 until end of turn.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Tap two untapped creatures you control: Root-Kin Ally gets +2/+2 until end of turn.

Lifelink

The Seven-fold Chant — At the beginning of your end step, if a creature died this turn, you draw a card and you lose 1 life. If seven or more creatures died this turn, instead you draw seven cards and you lose 7 life.

Gift a Food (You may promise an opponent a gift as you cast this spell. If you do, they create a Food token before its other effects. It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

Creatures you control get +2/+0 until end of turn. If the gift was promised, target creature you control gains first strike until end of turn.