Im not going to jettison the whole thing, just trim a piece or two
Big and expensive, but creating Goblins every time you cast a non-creature spell is big
It's an interesting Grixis commander to build around using cards that offer your opponents villainous choices, like Missy, Sycorax Commander, or Hunted by The Family, and traditional voting cards with abilities like the council's dilemma
Suppression Field If you run few or no activated abilities yourself, or perhaps you just have enough mana that you don't have to care, Suppression Field can do a ton of work for you against the likes of Abzan, Twin, Affinity, Tron, and more
The same effect can be obtained by copying the Jewel
It's not the worst plan, to be honest, but I'm still not bullish on either of these creatures