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When your security is reduced to near the danger point is your chance to digivolve into Jupitermon for a low cost

It's themed to generally look after various other cards from Hyper Coliseum, used in Digimon Tamers, even though the blue card itself never had a card in that style previously (as far as I recall), although it appears to have taken some inspiration from the version of the card in Battle Spirits

Digimon Card Game Secret Rare Mastemon Live TCGplayer market price 7-Day Change -7.6% vs last week Market Trend Falling TCGplayer price Market price Sales volume Jan 2026 today Price by Condition 3 Anchored to market price condition spread from TCGplayer Near Mint Foil English $9.56 -7.6% Lightly Played Foil English $11.64 +0.3% Moderately Played Foil English $23.00 +0.0% Mastemon FAQ How much is Mastemon worth right now

They're not part of the art, and Juggletron just can't get a grasp on them

It sits in a place where it is just so overshadowed by cards like Force of Will that people don't pay it much attention