I might be wrongthree-mana planeswalkers are always worth considering, and Tezzerator players are rightly excited about thisbut the 1RB mana cost is rough, the tokens cant attack, and the -1 ability doesnt provide any card advantage unless you want the artifact to be sacrificed for some reason
They also have a big old chunk of text that reads, Whenever another creature dies, or a creature card is put into a graveyard from anywhere other than the battlefield, or a creature card leaves your graveyard, Syr Konrad, the Grim deals 1 damage to each opponent. That means that your milling is killing, and you can just be chilling
You can also tag team
The extra ward can come in handy versus opponents free-to-cast removal spells like Snuff Out
The mechanic disappeared right after in Eldritch Moon because the story shifted toward cosmic horror once Emrakul showed up, there werent any mysteries left to solve
You get a 6/6 body, flying, uncounterable, firebreathing and protection from two colors