By sacrificing any creature or artifact when you attack, Gut rewards you with a 4/1 menace skeleton thats already swinging
Should you fail to pay, Primordial Ooze not only taps itself (and thus becomes useless), but it will deal that much damage to you
Get the extra benefits of cards like Borborygmos Enraged, Seismic Assault, Bone Miser, Green Goblin, Nemesis, and Lluwen, Imperfect Naturalist, and then bring those lands right back to your hand
If more cards were to focus on the commander as the focal point of the deck rather than splitting its focus across multiple archetypes, this deck would actually be interesting
Even one successful use is generally worth it, and if you have the means to shuffle your library through a fetchland like Misty Rainforest, a tutor effect like Worldly Tutor, or even another mana ramp spell like Skyshroud Claim, you can improve your odds of success dramatically