Echidna, Nascent Endbringer

Haste, Trample, Vigilance
Whenever damage dealt by Echidna would cause
a creature to die, instead exile it under Echidna.
Echidna gets +1/+1 for each of these creatures.
When Echidna leaves the battlefield, return all creatures exiled beneath her to the battlefield
under their owners control.
{t}: Fight target creature you control.
{t}: Create a token that's a copy of any
creature exiled beneath Echidna.