When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell
Illustrated by OKUBO, its the kind of card that catches your eye in a binder immediately

Other printings of Axew $73.75 Axew BW Black Star Promos $3.52 Axew BW Black Star Promos $1.83 Axew BW Black Star Promos Axew Dragon Vault Axew Dragon Vault $0.27 Axew BREAKthrough $0.24 Axew BREAKthrough $0.06 Axew Brilliant Stars Most valuable cards in Black Bolt View the full price guide $465.07 Victini Black Bolt $402.65 Zekrom ex Black Bolt $221.66 Seismitoad Black Bolt $216.31 Zekrom ex Black Bolt $83.62 N's Plan Black Bolt $71.25 Kyurem ex Black Bolt $64.00 Solosis Black Bolt $61.89 Genesect ex Black Bolt More cards by Taiga Kasai $65.98 Mega Gengar ex Ascended Heroes $38.86 Houndoom Shrouded Fable $31.79 Greninja SWSH Black Star Promos $10.72 Mega Hawlucha ex Ascended Heroes $8.84 Accelgor White Flare $8.07 Mega Scrafty ex Ascended Heroes $0.21 Spectrier Ascended Heroes $0.14 Team Rocket's Spidops Destined Rivals Discover Keep browsing Dragon typeDragon type Pokmon cards SetBlack Bolt Most valuableTop 100 Pokmon cards You might also like...

Actually, all the cards, period, although only some Duelists are sufficiently in touch with theirs for this to apply
Vintage card (LP or better)
Pairs with the Dragonite VSTAR HR for Kanto pseudo-legendary collectors