Basic Energy cards are core when building a deck, but a player can only include four Special Energy cards
Play Rule #13 states: Abilities which refer to other cards owned outside the game (Wishes, Spawnsire, Research, Ring of Ma'ruf) do not function in Commander without prior agreement on their scope from the playgroup. Therefore, Spike is twice banned in Commander, and even if Unstable were allowed, Spike wouldnt be able to be played
GrimDeck was built from the start to be both a collection tracker and a deck builder in the same app, rather than adding one feature onto the other after the fact
I dont think that Shadow of Mortality slots cleanly into existing Deaths Shadow decks, but I believe there are shells that exist to make it work
Preview season is upon us, which means I am once again brooding, writing card reviews in the dead of night, in an icy cold room, alone