Filanos, Cycle of Life

Whenever a creature you control dies, return
target land in your graveyard to your hand.
Whenever a land you control is sent from the
battlefield to the graveyard, return target
creature card from your graveyard to your hand.
"As the plants grow, the beast eat it. As the beast dies,
it feed the plants. As so the cycle of life goes on."
— Chronicles of Origins