Rozemyne, Saint of Ehrenfest

Hexproof.
Whenever you cast an enchantment, instant or
sorcery spell, put a page counter on Rozemyne,
Saint of Ehrenfest.
{4}{r}, Remove 5 page counters from Rozemyne:
Exile the top 5 cards of your library, until end of
turn you may play those cards and you may cast
enchantment spells from among them without
paying their mana costs.