A cards scarcity, condition and the actual Pokmon on it all play a role in its value
A trophy border, a contest credit, or an event stamp is the sign of something special
I also really like Mask of Griselbrand since if the equipped monster dies and you have life to spare you can take advantage of its triggered ability to draw a bunch of cards
(You can only gain this effect once per turn.) If another "Madolche" card(s) you control or in your GY is added to your hand or shuffled into your Main Deck by a card effect: Set 1 "Madolche" Spell/Trap directly from your Deck, except "Madolche Salon"
Blood Moon says, Nonbasic lands are Mountains, whereas Urborg, Tomb of Yawgmoth says: Each land is a Swamp in addition to its other land types. The key difference here is the words in addition to. If you dont see this wording, like on Blood Moon, then the type change will overwrite whatever types the card had before
Mewtwo was a popular option for this gimmick