[18] [19] Lands, enchantments, artifacts, creatures, planeswalkers, and battle cards are considered "permanents" as they remain in play until removed by other spells, ability, or combat effects
Many spells return creatures to their owners' hands in blue, so to choose this one in particular, you are either playing +1/+1 counters in a UG deck, a blink deck, or both, and you get an excellent blue board wipe

Double Masters Variants WHITE | BLUE | BLACK | RED | GREEN MULTICOLORED | COLORLESS | ARTIFACT | LAND | ALL CARDS WHITE Avacyn, Angel of Hope Council's Judgment Stoneforge Mystic Wrath of God BLUE Jace, the Mind Sculptor Brainstorm Cyclonic Rift Force of Will Phyrexian Metamorph BLACK Dark Confidant Fatal Push Thoughtseize Toxic Deluge RED Blood Moon Goblin Guide Sneak Attack GREEN Crop Rotation Doubling Season Exploration Noble Hierarch Chord of Calling MULTICOLORED Atraxa, Praetors' Voice Kaalia of the Vast Meddling Mage COLORLESS Karn Liberated ARTIFACT Batterskull Blightsteel Colossus Chrome Mox Expedition Map Lightning Greaves Mana Crypt Mox Opal Sword of Body and Mind Sword of Feast and Famine Sword of Fire and Ice Sword of Light and Shadow Sword of War and Peace Wurmcoil Engine LAND Academy Ruins Urza's Mine Urza's Power Plant Urza's Tower Plains Plains Island Island Swamp Swamp Mountain Mountain Forest Forest WHITE | BLUE | BLACK | RED | GREEN MULTICOLORED | COLORLESS | ARTIFACT | LAND | ALL CARDS

Artifact Herald's Horn As this artifact enters, choose a creature type
Targeting your Eldrazi Scion and sacrificing it in response to cast a two-drop and a three-drop on turn 4 with Catacomb Sifter is nice
Alongside each of the twenty Mythic Rare cards that were selected to receive this Secret Lair-esque treatment, serialized copies will also be released to the wild