Zyden, Soul Syphoner

When Zyden enters the battlefield, choose up to
X target creatures, those creatures phase out
until Zyden leaves the battlefield.
Zyden gets +1/+1 for each permanent phased
out.
{b}{r}: Return target creature card from your
graveyard to the battlefield tapped and then
phase it out until Zyden leaves the battlefield. If
that creature would phase back in, exile it
instead.