Spellbook trapped

When this card enters the battlefield, destroy all other spellbooks you control. Whenever you cast a spellbook page, draw two cards. if a spellbook page entering the battlefield would cause an effect to happen, that effect does not happen. Whenever you activate an activated ability of a spellbook page, draw a card and lose 1 life. Counters cannot be placed on this creature, and its power and toughness cannot be changed. {flavor}once they realized how much power the spellbook contained, they encased it within a sphere of magic so that nobody could use it.