golden energy pokemon card - Fire 230/197 - Obsidian Flames - Hyper Rare Luminous Energy - SV06: Twilight

The deck then adds a number of strong mutate creatures including Illuna, Apex of Wishes, Gemrazer, Auspicious Starrix, Parcelbeast, Trumpeting Gnarr, and many more

For example, if you cast Crabomination for its emerge cost and sacrifice an artifact whose mana value is 3, Crabomination's mana value remains 6

It also doesn't enter prepared, which is probably what prevents the card from being too overpowered

Vivien, Monsters Advocate +1 ability feels like a nice counters choice here, because she bring three types of counters into the deck, giving you another solid amount of counters just like Crystalline Giant which is already in the deck