Each of these legendary artifacts discounts spells of the relevant color, provides a useful passive ability, and has an activated ability that synergizes with its passive ability
Brock's Rhydon [1st Edition] #2 Pokemon Gym Heroes Keep track of your collection value over time
Its functionally exactly that card, but it exists as a body on the battlefield until you need to use it
Maybe this exact method of release wouldnt be possible for larger UB sets to come, but the ideas of matching crossover IP to other sets in their release window, and of spotlighting their Universes Within versions, should have been carried over more zealously
It gets better when you're dealing with a 187 creature, but it's fine even when all you're doing is saving your best guy from a removal spell
6 - Pikachu (Secret Art - 160/159) The only card from the base expansion that is in the top 10