Mistform Warchief

The cost reducer that refuses to commit to a tribe. Most cheapening lords of its era picked one creature type and stayed there: Goblin Warchief discounted Goblins and nothing else. This one is an Illusion, so its static discount is natively live on Illusion spells the moment it resolves, no activation required. The tap ability is the second lever: it lets you redefine the creature's type once per turn, so the reduction can be retuned to whatever you mean to cast next. Become a Wizard while you deploy Wizards, flip to Soldier when the board has shifted. The wrinkle is the timing. The type change lasts only until end of turn, and the discount keys off the creature's current type, so the broadened reduction is live only on the turn you set it and only for creatures whose type matches at the moment you cast them. A 1/3 body is built to survive and keep subsidizing rather than to attack, which suits a card meant to sit back and pay out over several turns. It belongs to the Mistform line of shapeshifters, the cycle's contribution to a tribal-matters experiment that handed Illusions the universal-creature-type trick. As a build-around it never asked for a deck devoted to one tribe; it asked for a deck that wanted to be several tribes in sequence, which is the more interesting and more fragile thing to assemble.