Arrester's Zeal

Target creature gets +2/+2 until end of turn.
Addendum — If you cast this spell during your main phase, that creature gains flying until end of turn.

Jump Scare

Until end of turn, target creature gets +2/+2, gains flying, and becomes a Horror enchantment creature in addition to its other types.

Temur Battle Rage

Target creature gains double strike until end of turn.
Ferocious — That creature also gains trample until end of turn if you control a creature with power 4 or greater.

Soltari Lancer

Shadow (This creature can block or be blocked by only creatures with shadow.)
This creature has first strike as long as it's attacking.

Soltari Trooper

Shadow (This creature can block or be blocked by only creatures with shadow.)
Whenever this creature attacks, it gets +1/+1 until end of turn.

Double Cleave

Target creature gains double strike until end of turn. (It deals both first-strike and regular combat damage.)

Brute Force

Target creature gets +3/+3 until end of turn.

Plains

Soltari Foot Soldier

Shadow (This creature can block or be blocked by only creatures with shadow.)

Boros Guildgate

This land enters tapped.
{T}: Add {R} or {W}.

Mana Tithe

Counter target spell unless its controller pays {1}.

Augur il-Vec

Shadow (This creature can block or be blocked by only creatures with shadow.)
Sacrifice this creature: You gain 4 life. Activate only during your upkeep.

Fling

As an additional cost to cast this spell, sacrifice a creature.
Fling deals damage equal to the sacrificed creature's power to any target.