Your search for "Swamp Mirrorer SGX3-ENG18" revealed the following:
Swamp Mirrorer - SGX3-ENG18 - Common - 1st Edition from Speed Duel GX: Duelists of Shadows 1st Edition, available at 401 Games Canada. Rarity: Common Card Text:Activate this card by declaring 1 Monster Type and 1 Attribute; Special Summon this...
Swamp Mirrorer - BP03-EN236 - Common - 1st Edition from Battle Pack 3: Monster League 1st Edition, available at 401 Games Canada. Rarity: Common Card Text:Activate this card by declaring 1 Monster Type and 1 Attribute; Special Summon this card...