Demonic Tutor [Collectors' Edition] Merfolk Warrior it gains the following abilities

it gains the following abilities until end of turn

Set: Double Masters Type: Creature — Angel Rarity: Mythic Cost: {3}{W}{W} Flying

let A be that creature's power and B be that creature's toughness

Set: International Collectors' Edition Type: Enchantment Rarity: Rare Cost: {1}{U} You may have Copy Artifact enter the battlefield as a copy of any artifact on the battlefield

The system can be changed from within

Demonic Tutor [Collectors' Edition] Merfolk Warrior it gains the following abilitiesSet: Collectors' Edition Type: Sorcery Rarity: Uncommon Cost: {1}{B} Search your library for a card, put that card into your hand, then shuffle.