There's a hilarious game where pro player Brian Braun-Duin was playing Nadu at a Nerd Rage Games event and presented the combo, but his opponent was just like, "All right, combo off and kill me." And BBD proceeded to spend the next hour seemingly aimlessly looping through his deck
BPhillipYork: Bleah
Congregate | Rarely going to be too valuable / too situational Boros Guildmage | Use a Dragon Tempest or something, creatures too easy to remove, and mana sponges One or a couple of these should get you Kiki-Jiki, Mirror Breaker in there
In an annoying stax deck having this on top is pretty useful for shutting down creature-based strategies, though usually, that's just going to be mana dorks, except when you randomly rob Kenrith, the Returned King of his abilities
There are tons of other synergistic engines like Goblin Welder, Daretti, Scrap Savant, and Goblin Engineer to fit in all kinds of combos and interactions into the list
Should you have made your Morph an Artifact through Liquimetal Coating, it will remain an artifact after being turned face up