So many content creators are doing this, so I've tried it too. My take on the challenge was Bruse Tarl/Silas Renn : a 4 color artifact sacrifice and recur deck with a lot of great "when an artifact dies, each opponent loses life" effects.
So the main few I suggest are The Ozolith, Branched Evolution, The Great Henge, Ozolith the Shattered Spire, Primeval Protector, Kodama of the West Tree, and Surrak and Goreclaw, just to name a few.
