The issue with Charm is that it is a little narrow and a little situational
Why these prices change 2022 cards trade on relative supply: PSA pop reports, sealed-product scarcity, character popularity (especially Eeveelutions, starters, and legendary Pokmon), and grading-grade availability
Card Set(s) -AWAKENING OF THE NEW ERA-[OP05] CARD VIEW OP05-091 | SR | CHARACTER Rebecca Attribute Wisdom Block icon 2 Effect [Blocker] [On Play] Add up to 1 black Character card with a cost of 3 to 7 other than [Rebecca] from your trash to your hand
Even more well-known Supporter SIRs like Dawn from Phantasmal Flames only fetch modest sums once a set has been out for a while
Whereas a typical Kenrith deck focuses on using their activated abilities to generate advantage on your board, theres no reason you cant use these effects on your opponents
Of course, this includes Sonic himself, a Hedgehog Warrior built for decks with Flash and Haste in mind