If you can find ways to untap and tap Sanwell multiple times, like with Puppet Strings, you can keep the card advantage flowing
Mono-White has been a punchline in the Commander community for quite some time, and while this card does not fix whites main issues (lack of card draw and mana ramp), it does give it an inexpensive, combo enabling commander
Now which one was it? Flearan One-Eye, goblin engineer Illustrated by Filip Burburan Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
So this one is a tie
Especially against Kozileks Return
There are a few exceptions to this, like Eldrazi Repurposer, Glaring Fleshraker, Writhing Chrysalis (god, I hate this card in Limited), Spawn-Gang Commander, Emrakuls Messenger, and Drowner of Truth