There are a number of ways that you can sell your high-value collectibles
Reaver Cleaver is an easy add to any Treasure deck, for instance, while Hammer is top-tier protection for your Commander
Tool Cards are Trainers which you can attach to your Pokemon to power them up, providing additional effects
There are lots of Tropical Island tokens lying around, all used up, waiting to be put toward some better purpose
This can be built in many ways, though the most popular option is to build a stax deck looking to leverage Omen Pool combos
Legendary Creature - Fox Samurai Counters (CTRL to add secondary) Creature Creature (CTRL to add secondary) Draw Pearl-Ear, Imperial Advisor Lifelink Enchantment spells you cast have affinity for Auras