Celeste, Shade of the Wilds

Fated Echoes — Whenever a creature an opponent controls dies, you may exile it with a fate counter on it.

Haunting Wilds — At the beginning of your upkeep, create a token that’s a copy of a creature in exile with a fate counter on it, except it’s a black and green Nightmare in addition to its other types.

“The lost and forgotten roam the wilds, bound by fate to walk once more.”