Whisper Idol

Creature spells cost you {c} less to cast.
Insanity {6}, Sacrifice Whisper Idol {t}: Until end
of turn, you may cast creature cards from your
hand as if they had flash. (Insanity is a cost. To
pay it, shuffle your library, then exile the top X
cards.)
"All those who know for sure are long dead, but the
Gnkoptic texts hint tribes used these to contact, not a
god, but something else. It's odd, when I hold it, I
can almost hear them whispering in dead tongues."