Proft's Eidetic Memory Screaming Nemesis This Town Ain't Big Enough Up the Beanstalk Vivi Ornitier Leyline of Resonance is banned in Best-of-One Constructed formats

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

Overall, Destined Rivals sealed product is proving a safe hold
My only tip here is that, all things being equal and the game not coming down to finding a specific card, the two card pile will be way more attractive whether it is face-up or face-down
Artifact Herald's Horn As this artifact enters, choose a creature type
If a creature has an omen in its text box, you can choose to either play it normally, summoning it as a creature, or to play it as a sorcery or instant, as described in the omen section of the card (the left side of the text box)