Josalyn, The Frog Queen

Frogs you control have Reach.
At the beginning of each upkeep create a 1/1
green Frog token with {t} Sacrifice a creature you control and this creature gains its power and toughness.
Whenever a creature enters the graveyard from anywhere, create a
Fly token with {1} {t} Sacrifice Fly and a Frog you control gets 1/1.