War of the Spark

Battlefield Promotion | Instant | | Put a +1/+1 counter on target creature. That creature gains first strike until end of turn. You gain 2 life. | Scott Murphy

Divine Arrow | Instant | | Divine Arrow deals 4 damage to target attacking or blocking creature. | Kieran Yanner

Martyr for the Cause | Creature | Human Soldier | When Martyr for the Cause dies, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) | Zoltan Boros

Pouncing Lynx | Creature | Cat | As long as it's your turn, Pouncing Lynx has first strike. | Sidharth Chaturvedi

War Screecher | Creature | Bird | Flying {5}{W}, {T}: Other creatures you control get +1/+1 until end of turn. | Dan Scott