Like most Pokmon cards, the value of Quilava depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Neo Genesis)
It can also fix it, too, however, since tapping something like a Blood Crypt for red will get you a black as well
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Inner dimensions: 3.08 in. x 4.95 in. x 5.51 in. (78.25mm x 125.75mm x 140mm)
This means that if you somehow do lose the Initiative, if Seasoned Dungeoneer is alive, you can simply attack with it and take the Initiative right back, with some added Explore value on top of it