Ghrin-Danu, The Lost God

Soulbond
As long as Ghrin-Danu is paired with another creature, each of those creatures has "When this creature dies if it was a nontoken, create a token
that's a copy of that creature, except it's 1/1 and
it's a spirit.
At the beginning of your upkeep, sacrifice any
number of tokens. Return any number of
creatures that share a name with a token
sacrificed this way from the graveyard to the battlefield.