Wild Shape

The druid's shapeshifting rendered as a combat trick with three answers folded into one green mana. The modal template buys coverage: the same instant grants hexproof (a 1/3 Turtle that shrugs off the spot removal aimed at it), reach and a fat backside (a 1/5 Spider that walls fliers and ground attackers alike), or trample on a 3/3 Elephant to push damage past a chump. The wrinkle that inverts the usual pump-spell math is that the effect overwrites base power and toughness rather than adding to them, so pointing it at anything larger than a 3/3 shrinks it. Most combat tricks reward you for having the bigger body; this one wants the smaller one, the creature whose stats are worth throwing away for a keyword. A one-drop mana dork becomes a hexproof blocker; a 2/2 becomes a reach wall; a token becomes a trampling threat. The hexproof mode reads as the headline, functioning as a one-mana counter to targeted removal, but the reach and trample lines are what keep it a genuine toolbox rather than a single-purpose safeguard. Flavor and function line up cleanly: a druid becoming turtle, spider, or elephant is exactly the wild-shaping the card is drawn from, and each form maps to a recognizable combat role.