Pegasus Guardian
{5}{W}Creature — Pegasus
Flying
At the beginning of your end step, if a permanent you controlled left the battlefield this turn, create a 1/1 white Pegasus creature token with flying.
Pegasus Guardian // Rescue the Foal
{5}{W} // {1}{W}
Creature — Pegasus // Instant — Adventure
Oracle Text
Rescue the Foal
{1}{W}Instant — Adventure
Exile target creature you control, then return that card to the battlefield under its owner's control. (Then exile this card. You may cast the creature later from exile.)