He can tap into the power of his defeated allies to deliver swift destruction as a result of battle
Evaluate fundamentals: (1) Strong character with generational appeal (Charizard, Pikachu, fan-favorites), (2) Exceptional artwork by respected artists, (3) True scarcity (not artificial), (4) From significant sets with cultural relevance, (5) Cards you would want to own even if prices never recovered
However, a unique type of card that players also value is the reverse holographic
This is particularly important for common cards like The One Ring , which is not only indestructible but also protects your opponent from Phlage, Titan of Fire's Fury for a whole turn, giving them the opportunity to come up with a foil to what you imagined was a winning boardstate
Image comparison (remastered to the left vs scans to the right): You can download sets here: