Kellan, the Fae-Blooded [Wilds of Eldraine Prerelease Promos] Merfolk Counter target spell if its

Counter target spell if its converted mana cost is X

The Japanese Uprising and their schism from Yu Jing bring forth the Non-Aligned Armies (NA2)

Set: The Dark Type: Creature — Goblin Wizard Rarity: Rare Cost: {2}{R}{R} {T}: You may put a Goblin permanent card from your hand onto the battlefield

but as a whole session

Kellan, the Fae-Blooded [Wilds of Eldraine Prerelease Promos] Merfolk Counter target spell if itsSet: Wilds of Eldraine Prerelease Promos Type: Legendary Creature Faerie Rarity: Mythic Cost: {2}{R} Double strike Other creatures you control get +1 +0 for each Aura and Equipment attached to Kellan, the Fae Blooded. Birthright Boon 1W Sorcery Adventure Search your library for an Aura or Equipment card, reveal it, put it into your hand, then shuffle.