Yu-Gi-Oh! · Ancient Sanctuary

King of the Swamp

French name: Roi des Marais

AST-082Rare

King of the Swamp (Ancient Sanctuary AST-082) has a market price of US$1.73 to US$3.00 as of Nov 9, 2026.

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Price guide

The market price on TCGplayer, in US dollars: a guide, not an offer.

Market price

UnlimitedUS$1.73Low US$0.69

1st EditionUS$3.00Low US$1.46

As of Nov 9, 2026 · The market price is TCGplayer’s, in US dollars. It is a guide, not an offer.

Card details

Type: Effect Monster
Level: 3
Attribute: WATER
Monster type: Aqua
ATK: 500
DEF: 1,100

Card text

You can substitute this card for any 1 Fusion-Material Monster. When you do this, the other Fusion-Material Monster(s) must be the correct one(s). Discard this card from your hand to be Graveyard to add a Polymerization Spell Card from your Deck to your hand. The Deck is then shuffled.

About this card

King of the Swamp is card AST-082 in Ancient Sanctuary, a Yu-Gi-Oh! set released Jun 1, 2004. Rarity: Rare. Finishes: Unlimited, 1st Edition. Reference market price on Nov 9, 2026: US$1.73 (Unlimited), US$3.00 (1st Edition). The Unlimited price did not change over the last 30 days. Source: TCGplayer market data via tcgcsv.com, updated daily. A reference price is not an offer.