While it isnt anything to write home about when you cast it, the renew ability of Naga Fleshcrafter has a ton of potential to completely change the game if you have the right creature on the battlefield
Being an Artifact, theyll also fit into any deck, no matter what your theme or color identity is
Of the five, Punishment stands out above the others for one reason: Red Deck Wins
Im sure this will be yet another weird Commander buildaround, but I think Niv-Mizzet, Guildpact mostly wants to hang out in the graveyard waiting to get pulled along by your Lazav, Wearer of Faces, like Weekend at Bernies 2: Guildpact Edition
Brainstorm lets you draw 3 cards and then put 2 cards from your hand on top of your deck in any order
My hope was that going to four Fabled Passage for additional land thinning, a fourth Pylons for more selection, Ureni which is better into an open board than Craterhoof, and better sideboard plans would be just enough to deal with the Running out of Gas + Flood problem