The first non-Lemur creature spell with flying you cast during each of your turns costs less to cast.
Whenever another creature you control with flying enters, Momo gets +1/+1 until end of turn.
Momo is a one-drop mono-white flyers aggro/go-wide commander. You flood the board with evasive creatures, get repeatable cost reduction on your best flying threats, and use anthems and equipment to push lethal damage through the air while Momo grows each combat.
Cheap one-mana commander that comes down turn one and pressures immediately
Mono-white gives access to the format's best anthems and go-wide payoffs
Flying evasion makes combat damage hard to block
Cost reduction smooths out curve and helps deploy a wide flying board fast
Mono-white means no card draw or ramp engines, leading to running out of gas
Heavily reliant on the battlefield; vulnerable to board wipes
Single-color decks struggle to interact with combos and resolved problem permanents
Momo's buff is only until end of turn, so it doesn't permanently snowball
Legendary Creature — Lemur Bat Ally
less to cast.