Into the Beyond

Assist (Another player can pay up to {x} of this spell's
cost.)
Search up to X target player's libraries for X
total cards and exile them. You may cast those
cards for as long as they remain exiled, and you
may spend mana as though it were mana of any
type to cast those spells.
Unborn eternity does not die; existence is dying and
falls asleep in the eternity outwith existence.