Skycat Sovereign

A two-mana flier whose scaling clause points inward: it grows for every other flier you control, so it reads its own board as raw stats. Most creatures that key off a keyword tribe wait on a payoff you assemble elsewhere; this one manufactures the very bodies that feed its size, which means an empty battlefield is not a dead draw. Each token from the activated ability is a 1/1 flier in its own right and simultaneously another +1/+1 for the Sovereign, so the second Cat Bird you make is worth two points of power and toughness rather than one. The feedback loop is the payoff: it can build its own board and cash that board into a growing threat without any help from the rest of the deck. The tension lives entirely in the mana. It lands as a 1/1 that matters only once other fliers exist, fragile the turn it arrives and a genuine clock two turns later, and the activation cost is steep enough that developing and pumping in the same early window is rarely on the table. It rewards a deck already committed to going wide in the air, then rewards it again as a mana sink when the hand runs dry, doing the token engine and the self-scaling threat in a single white-blue slot.