BT17-060 SR Digimon Lv.7 Armageddemon Color Black White Cost 16 DP 15000 Digivolve Cost 1 BlackWhite 7 from Lv.6 Form Mega Attribute Unknown Type Unidentified Card Text 1 [Effect] When this card would be played from the hand, by placing up to 13 cards with the [Unidentified] trait or [Diaboromon] in their texts from your trash at the bottom of the deck, reduce the play cost by 1 for each one
MZTM-EN009 Verdict of Anubis Counter Trap Card When your opponent activates a Spell/Trap Card, while you control 3 of more other Spells/Traps: Negate the activation, and if you do, destroy that card, then if you control Temple of the Kings, you can destroy as many monsters your opponent controls as possible, then inflict damage to your opponent equal to half the total ATK of those destroyed monsters
The price of a regular Jolteon EX from Prismatic Evolutions suggests that this card will also see a decline in value, but it's hard to say for sure without concrete evidence
How about cards that have half of a mana symbol such as Little Girl
10 Harpie Lady Sisters The Harpie Lady Sisters are nothing to turn one's nose up at