Ancients Awakened/A Page of the Rune Book

A Page of the Rune Book is a Hardmode tier accessory that is obtained from the Treasure Bags when opened in Hardmode. It summons runes to fight for you depending on the amount of empty minion slots you have. If you have 1 empty slot, it summons a bunny rune. When you have 2 empty slots, it summons a bunny and a discord rune. When you have 3 minion slots, it summons a bunny, a discord and an energy rune to fight for you.

Trivia

 * This, along with are the only accessories that are obtainable from developer bags. They also upgrade into their EX variants as well.