Combat Trick

Cheap instant-speed spells you hold up to surprise an opponent in combat, granting a temporary +X/+X boost or keyword that wins a fight, pushes lethal damage, or saves a blocker. Giant Growth and Infuriate hand out a flat until-end-of-turn buff, Become Immense scales with the cards in your graveyard, Vines of Vastwood can both protect and pump, and Berserk gives trample with a big power swing. The defining traits are instant speed and a one-shot, temporary effect resolved during combat. Permanent buffs from Auras or Equipment, and sorcery-speed team boosts, are not in this set because they neither resolve at instant speed nor expire at end of turn.