Vixthra, Deathless Tyrant

Vigilance, Haste
Vixthra, Deathless Tyrant enters the battlefield
with X +1/+1 counters on it.
Whenever Vixthra, Deathless Tyrant enters the battlefield and at the beginning of your upkeep,
you may return a target permanent with
converted mana cost X or less from a graveyard
to the battlefield under your control.
{x}{t} Vixthra, Deathless Tyrant phases out, then returns to the battlefield with X +1/+1 counters
on it.