Opportunistic Dragon [Throne of Eldraine Prerelease Promos] Theros Promos You must also Tribute monsters

You must also Tribute monsters from your hand or field whose total Levels equal exactly 6

So what would you call *two* of them

Set: Premium Gold: Infinite Gold Card type: Xyz/Effect Monster Rarity: Gold Secret Rare Attack: 0 Defense: 0 2 Level 11 monsters You can also Xyz Summon this card by using a Rank 8

{1}{B}{G}: Hissing Quagmire becomes a 2/2 black and green Elemental creature with deathtouch until end of turn

Set: Dark Crisis Card type: Equip Spell Rarity: Rare Attack: 0 Defense: 0 You must send 1 card from your hand to your Graveyard when you activate this card

Opportunistic Dragon [Throne of Eldraine Prerelease Promos] Theros Promos You must also Tribute monstersSet: Throne of Eldraine Prerelease Promos Type: Creature Dragon Rarity: Rare Cost: {2}{R}{R} Flying When Opportunistic Dragon enters the battlefield, choose target Human or artifact an opponent controls. For as long as Opportunistic Dragon remains on the battlefield, gain control of that permanent, it loses all abilities, and it can't attack or block.