Cayth, Famed Mechanist

Three token-and-counter keywords stacked on one Dwarf, and the design intent is legible in how they chain. Fabricate is the seed: every nontoken creature you control lands with the choice of a +1/+1 counter or a 1/1 Servo token, so the battlefield fills with two kinds of thing worth copying and worth pumping. The tap ability is the payoff, offering populate (duplicating the best token you already control, Servo or otherwise) or proliferate (choosing any number of permanents and players with counters and adding one more of each kind they already have). That handoff is the whole engine: fabricate builds the raw material, and the modal tap converts it into an advantage that compounds a little each turn rather than resolving all at once. The one-activation-per-cycle limit is what keeps it grounded; you are always deciding whether to widen the board with a copied token or deepen the counters already on it, and you never get to do both in the same window. The reach past +1/+1 counters is worth noting: proliferate does not care what kind of counter it touches, so loyalty, charge, and any other counter your deck traffics in all ride along. This is a build-around card in the most literal sense, a hub for a deck that wants tokens and counters treated as the same resource. On its own, a 3/3 that hands out fabricate is modest; the ceiling lives entirely in how many token-and-counter interactions you can point the tap ability at.