Just use them as fodder for your aristocrats
It also has synergy with other Musketeer characters by powering them up
I can imagine few things more satisfying for a Gruul player than flipping creature after creature off the top of their deck, all with a haste boost from Rhythm of the Wild, paying half the usual mana thanks to Nikyas influence
Seedborn Muse was revealed to be getting a reprint in Commander 2019 and, though Wizards did not reveal which deck it would be in, it will likely be included in the Morph deck
It is much easier to kill in cube than it is in a format like modern, in addition to that it is all too easy to ignore the effect of Keranos in the cube as well
Whenever you cast a historic spell, return target creature card with mana value 3 or less from your graveyard to the battlefield. You can basically make sure you use a lot of the sacrificial Artifacts time and time again by doing this, and it can be nearly impossible to beat with very little effort