Kiora, Matron of the Deep

This creature can't be exiled or sacrificed.
If you would draw your second card this turn,
you may exile it face down instead. For as long
as that card remains exiled, if it is a Merfolk,
Fish, Whale, Shark, Squid, Kraken, Leviathan, Octupus, or Serpent card, you may cast it as
though it had flash and it can't be countered.
"Come o' Titans of the Roiling Tides! Hear me!"