Venomous Changeling

Deathtouch on a 1/3 body is already a fine wall, deterring anything that swings into it and trading up against attackers of any size. The changeling text is what quietly reworks the accounting: because this creature carries every type on its line, it counts as a Warrior for Warrior lords, a Goblin for Goblin lords, a Rogue for Rogue payoffs, and it satisfies any "creatures you control of a type" trigger without asking the deck to bend around it. That combination is the whole design logic: a defensive body that fits every tribal shell without diluting it. Most tribal decks pay a cost to run off-theme utility; this one is on-theme by definition, so a deathtouch blocker becomes free-to-include insurance for aggressive tribes that otherwise have no interest in playing defense. It also functions as a removal magnet and a chump that punishes the attacker, since anything that dies to it dies regardless of its size. The rate is deliberately unflashy; the value lives in the type line doing work the body alone never could.