Equinox, The Tyrant

Eminence — As long as Equinox, The Tyrant is in the
command zone or on the battlefield, at the beginning of
your upkeep, up to one creature you control gains
Changeling.

Changeling, Indestructible, Deathtouch

When Equinox enters, choose three creature types.
Creatures of the chosen types gain +1/+1 for each other
creature of the chosen types.