Via these, and Delta of Invitation, Eldlich covers a lot of the blind spots seen by this strategy, and might even pull it into competition
Theres no fixed number on how many creatures a goblin Commander deck must have, and as you may have guessed certain commanders on this list like Mizzix of the Izmagnus run very few
I know it's not exactly a good suggestion, but if you want to build a deck around attacking with a really buffed up aura creature, you could try switching commanders to someone like Rafiq of the Many
A card game inspired by Magic: The Gathering, Duel Monsters became its own huge thing and its success attracted the attention of one giant from the gaming industry: Konami, who quickly got the rights to produce video games based on the IP
Ring of Destruction also has this potential, with the additional benefit of removing anything big enough to get over the walls
The hassle and experience gained from quest assets are a bonus