black holographic playing cards ACOLYTES card collector 15 Years of Fultons Limited

Appearing in just under 0.2% of Special Edition Collector Boosters, 1 of the 100 of each Realms and Relics card can be found here, like Ancient Tomb (Balin's Tomb) and The Great Henge (The Party Tree)

For Pokmon trading cards collectors : this Galarian Cursola Holo 079/192 card is considered as Holographic Variation card

Like Den Protector, these two are good cards in their own right that have relatively cheap activated abilities

Spanish Collar del Milenio Activacin de Habilidad Voltea esta carta cuando actives esta Habilidad

Those payoffs are still relevant in Commander, and Id argue that these cards are largely unknown to newer players and underutilized