Yahenni's Expertise (Game Day) [Aether Revolt Promos] Gym Heroes Unlimited and/or face-up from your field

and/or face-up from your field to the GY

You can only use the effect of "Unknown Synchron" once per Duel

Set: Dark Legends Card type: Normal Spell Rarity: Super Rare Attack: 0 Defense: 0 Destroy all monsters on your opponent controls

if you have 1 or more card(s) in your hand

• 2: Special Summon 1 "Mecha Phantom Beast" monster from your Deck

Yahenni's Expertise (Game Day) [Aether Revolt Promos] Gym Heroes Unlimited and/or face-up from your fieldSet: Aether Revolt Promos Type: Sorcery Rarity: Rare Cost: {2}{B}{B} All creatures get 3 3 until end of turn. You may cast a spell with mana value 3 or less from your hand without paying its mana cost.