Paradox, mystic guardian

This spell can't be countered
Flying, Hexproof, Vigilance
{1}{w}{u}: Exile target permanent, return that card
under the battlefield at the beginning of the next
endstep
When this card leave the battlefield you get an emblem
with "Sacrifice this permanente and pay {1}{w}{u}: put a card named Paradox, mystic guardian from the graveyard,
exile or hand into the battlefield"