Ivo, High Alchemist

{x}{u}, {t}: Target player exiles the top X cards of his or her library.
{x}{r}, {t}: Ivo, High Alchemist deals X damage to target creature. It can't be regenerated this turn.
{x}{g}, {t}: X target permanents gain hexproof until end of turn.
Discard two cards: Untap Ivo.