He's fabulous and versatile, making this a great card to pick up if you're looking for a consistent way to repeatedly draw cards
Cid, Timeless Artificer Cid, Timeless Artificer is an interesting build-around that I imagine comes in two flavors: You either go hard on looting, cycling, and self-mill to throw multiple copies of Cid in the graveyard, or you do some Mirror Box shenanigans
Rather than rewarding you as the mill player, it punishes your opponents for taking their game actions
Playing a Fireblast in response to a Natural Balance didnt just offset the sacrifice two Mountains cost, it actually netted two mana, since the lands from Natural Balance entered the battlefield untapped
Clive, while not as wordy as Terra, is still incredibly complex
Unlike mill, however, lifegain is rather popular