Stay safe, stay healthy, and stay out of the sun
You basically just treat them like emblems from planeswalkers
When the evoke elementals were spoiled in Modern Horizons 2, people waxed lyrical about how broken Grief with Ephemerate was going to be, but in practice that interaction did not make any material impact on the format, and instead its been more commonly combined with Fury and Solitude in the Four-Colour Yorion, Sky Nomad decks
But for those with a more studious eye, it became clear that Memnarchs much creepier than that, and you needed to be deeply invested in the lore of the original Mirrodin cycle to know that its actually Memnarch on Second Sight as well as Karl Kopinskis From the Vault: Relics Aether Vial, or that the thing on Eyes of the Watcher is in fact our good friend Memnarch and not some other random dude on a purple metal throne
The twist is a focus on artifact sacrifice you can make as many of those threats as you want if you have artifacts to transform into golem tokens