Bloodline Pretender
Two clauses point in different directions, and reconciling them is what makes this design sing. Changeling means the artifact counts as an Elf and a Goblin and a Sliver and everything else simultaneously, so any lord effect in your deck reads it as a valid target: an anthem, an overlord, a static tribal buff all land on it without translation. The counter engine ignores all of that. The type you name on entry (not the card's own encyclopedia of subtypes) decides which arrivals feed it, so you aim the accumulator at whatever tribe you happen to be running rather than reshaping the deck to fit the card. That divide is the elegant part. Note that it grows only itself, stacking a counter as each matching body arrives rather than handing a bonus to the whole team, which makes it a tribal payoff, not a lord. The colorless frame does quiet work too, giving a Human company or a Zombie horde an anchor that colored payoffs could never share across archetypes. And since the trigger keys off other creatures entering, never its own arrival, it wants a steady drip of matching bodies before the counters start to bite. Not a fast clock, then, but a universal one: a single grow-creature any tribal deck can slot in unmodified.
