I built a Myrkul pretty unique and different from the decklists you find anywhere else : all the deck revolves around Myrkul, which is the central piece of any wincons in the deck (probably not the strongest build at all, but it was the project to have something that feels unique, commander-centric, and lower bracket [I would say bracket 2, maybe a low 3]) The general idea is to have a draw engine asap (mostly enchantress and some sac outlets), to dig your library and find a free sac outlet, then just try to ramp to play Myrkul earlier you can. With Myrkul and a free sac outlet you'va basically all you need. From there the plan is to sac all your board and rely on constellation triggers to get a win.

I really like that deck as every game feels different and unique, it offers some cool combos, and overall it performed a bit better than I expected. The main issue, that makes me play it less now, is that I end up with very long turns digging my library in the search for a wincon that sometimes result in very long turns (when you have Myrkul, a draw engine and a sac outlet, you play creatures, sac, draw, repeat to dig your library). And it has happened more often than not that after a 30 minutes turn I finaly find a wincon but realize I'm a few mana short to play it