Imagecrafter

Type-changing as a repeatable, instant-speed effect, sold for one mana on the most fragile body the game prints. The job here is to lie about what a creature is: tap to rewrite a target's type line for the turn, which means the tribal payoffs and tribal hosers a deck is running suddenly apply to creatures that were never the right type. In a metagame built on creature-type identity, this is the wrench in the machine. It can turn an opponent's Goblin into an Elf so their own Goblin lord stops pumping it, recast a lone Soldier as whatever your board needs it to count as, or make a single attacker the legal target for a tribe-specific kill spell that could not otherwise touch it. The Wall exclusion is the lone guardrail on the activation, keeping the effect pointed at tribal manipulation rather than dredging up the defender-laden connotations that type once carried. A one-shot type-changer trades for nothing here, because an untapped Imagecrafter is a standing offer to relabel any creature every turn, which is far more corrosive to a tribal board than a single-use trick. It asks for a deck where creature type carries weight for everyone at the table, and in that context a 1/1 that costs almost nothing becomes a quiet way to break the symmetry tribal decks are built on.