Narset, Enlightened Master [Secret Lair Drop Series] Human Warrior The book shrieks horribly until

The book shrieks horribly until its cover is opened

You may cast a spell with mana value 5 or less from your hand without paying its mana cost

Set: Alpha Edition Type: Instant Rarity: Common Cost: {U} Target creature gains flying until end of turn

Set: Fourth Edition Type: Enchantment Rarity: Rare Cost: {R}{R} Players can't untap more than one creature during their untap steps

but dancing was a jingling delight

Narset, Enlightened Master [Secret Lair Drop Series] Human Warrior The book shrieks horribly untilSet: Secret Lair Drop Series Type: Legendary Creature Human Monk Rarity: Mythic Cost: {3}{U}{R}{W} First strike, hexproof Whenever Narset, Enlightened Master attacks, exile the top four cards of your library. Until end of turn, you may cast noncreature spells from among those cards without paying their mana costs.