Guardian Kay'est is a Sea Serpent Effect Monster with Attribute WATER, Level 4, ATK 1000, DEF 1800.
Monster cards contest the field through Summons, battles, and effects—check Level/Rank/Link and Attribute for Extra Deck or searchers.
On the current TCG and OCG Forbidden & Limited lists tracked here, Guardian Kay'est is Unlimited.
YGOPRODeck lists Guardian Kay'est for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Guardian Kay'est belongs to the Guardian archetype—use that tag when searching for engine pieces and tech options.
A listed print of Guardian Kay'est appears in Dark Crisis (DCR-009) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Guardian Kay'est is about $0.18 on Cardmarket (prices change frequently).
