Unesh, Criosphinx Sovereign
Hour of Devastation — Mythic
Legendary Creature — Sphinx
Sphinx spells you cast cost less to cast.
Whenever Unesh, Criosphinx Sovereign or another Sphinx enters the battlefield under your control, reveal the top four cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.