Plus, many cards and commanders from this set have synergies with removing cards from your own graveyard, so Kheru Goldkeeper has a natural home already
Continuing to mutate on top of one or several Greathorns can really help a player get ahead on mana while also triggering other mutate abilities that have been combined with it during the game
The deck starts by casting efficiently-costed creatures with strong abilities including Finneas (vigilance, reach, counters, card draw), Valley Questcaller (anthem effect), Burrowguard Mentor (grows with your army size)
With decks restricted to just 20 cards and a very limited card pool, finding little synergies and building your own decks is more achievable and accessible than in any other card game on the market right now
Therefore, many long-term Pokmon Trading Card Game collectors will likely have fond memories of them