Geth's Grimoire [Mystery Booster] War of the Spark Promos Set: Battle for Zendikar Prerelease

Set: Battle for Zendikar Prerelease Promos Type: Enchantment Rarity: Rare Cost: {3}{G} Devoid (This card has no color

Set: Aether Revolt Prerelease Promos Type: Sorcery Rarity: Rare Cost: {4}{G}{G} Draw cards equal to the greatest power among creatures you control

Set: Amonkhet Invocations Type: Instant Rarity: Mythic Cost: {1}{U}{U} Buyback—Discard two cards

and Helm of Kaldra have indestructible

Geth's Grimoire [Mystery Booster] War of the Spark Promos Set: Battle for Zendikar PrereleaseSet: Mystery Booster Type: Artifact Rarity: Uncommon Cost: {4} Whenever an opponent discards a card, you may draw a card. The book shrieks horribly until its cover is opened, granting the spirit inside a moment's rest from the painful stirrings of the book's contents.