Despite this minor drawback, as a Commander, Gishath still excels
Tormod is definitely the stronger of the two because black works better with the archetype and zombies have considerably more support that spirits, but you'll realistically play either one in your gravebreak deck, assuming your colors support them
Full Art exs now use a green, foil outline around the Pokmon
Earthcraft is the best source of mana to fuel a number of infinite combos involving Doubling Season, Cathars Crusade, The Meathook Massacre, and Corpse Knight, among others, but these cards only scratch the surface of your combo potential with this commander, so if thats your preferred style of play, the linked primer above is going to be your best starting point for deck construction
There are payoffs, but not necessarily enough to make you want to pack your deck with creatures of a certain type
This lets you create an exact copy of Pack Rat, copy ability included, for just three mana and a card from your hand, turning any late-game dead draws into more Rats for your swarm