Empyrean Eagle

Flying is the keyword most naturally distributed across two-color pairs, which is what makes an anthem for it worth building around: a deck that leans on evasive threats already wants a lord, and this one hands the whole team +1/+1 while keeping its own body off the count (a 2/3 flier that pumps the rest but not itself). The Bird Spirit typing is incidental; the payoff cares about the keyword, not the tribe, which is the whole point. Where most creature-anthems ask you to commit to a single creature type, this one asks only that your board fly, and evasion is precisely the axis where a static +1/+1 does the most work: it closes the clock, pushes threats out of range of the most common blockers, and turns a stalled air force into lethal reach. Stack two and the numbers scale linearly on every flier you control, which is why the effect reads modestly on one card and lethally on a full board. The design sits in a small line of keyword-based lords rather than tribe-based ones, trading the deckbuilding lockstep of a tribal payoff for the flexibility of caring about a mechanic that shows up in nearly every set.