Mothdust Changeling

A one-mana 1/1 that answers to every lord and every tribal anthem on the board: that universal type line lets it stand in as a Goblin, an Elf, a Merfolk, a Faerie, or whatever else a "choose a creature type" trigger or "for each creature of this type" payoff happens to be counting. The changeling clause is the structural work, sparing a deck the slot it would otherwise spend enabling a tribe. The self-tapping flying grant is the lesser half of the design, and it earns its keep more often than its reputation suggests: a wide board can lift one attacker over a stalled ground, or convert a spare body into an instant-speed flying blocker. But that ability also explains why the card wants a board behind it; the evasion is paid for by tapping a creature you control, so the design is deliberately deck-dependent, modest in isolation and sharp inside a developed go-wide shell. It belongs to the small family of cheap Shapeshifters built to slot into any tribe, where the printed activated ability is a bonus and the type line is the reason to run them at all.