Loyal Pegasus

Two power for one white mana is aggressive flyer math, and the second line is the tax that pays for it: this thing refuses to fight by itself. The clause forces a board, not a card. It wants a wide team where another attacker turns the Pegasus on, which means its true rate is conditional on your curve developing on schedule. That is the design problem of any pushed one-drop with a buddy clause: the body looks like a clock, but it idles whenever your other creatures stall. The restriction is a declaration check, not a combat leash, so it bites at exactly one moment. If the Pegasus is the lone attacker when attackers are declared, it cannot swing at all; but once it is legally in combat alongside a partner, killing that partner after attackers are declared leaves the Pegasus attacking unimpeded. The evasion matters most in the swarm context, where it is the piece sneaking damage over the top while ground creatures trade. On defense the same rule applies in reverse: it can block only if another creature is also declared as a blocker that step, though the two can guard separate attackers rather than gang up on one. That makes it a soft defender precisely when a small white deck is short on bodies. It is a creature built to be the second name in a sentence, not the first: a go-wide payoff deliberately handcuffed so the rate never gets to run unsupported.