Mistform Mutant

A block built around creature types needed cards that could lie about what a creature was, and the Mistform Illusions did exactly that. Most of them could only retype themselves, which made them passable enablers and little else. This one points the ability outward: for it rewrites any creature's type, friend or foe, as many times a turn as you have mana to spend. The difference is direction, because retyping an opponent's creature is rarely defensive. It is a setup tool. A creature that suddenly counts as the wrong tribe falls outside whatever lord or anthem was propping it up; a creature pushed into the right tribe walks into a tribal removal spell that named that type. The "other than Wall" clause is the lone guardrail, and it marks what the designers wanted off the table: granting the Wall type does not blank an attacker, but used at instant speed before attackers are declared, a free Defender stamp would have turned the ability into a recurring pre-combat tax rather than a clean retype. With that exclusion in place, the rest is wide open. The 3/4 body is incidental; the value is a repeatable, instant-speed answer in a world where what a creature is often mattered more than its stats. It reads as ordinary outside that world and as a toolbox inside it.