That comes from having three different types of Llanowar Elves, two types of Cultivate, and powerhouses like Nyxbloom Ancient
Devour For Power had maybe five cards that let you mill yourself, while Sultai Arisen has 14 at various spots on the curve: Hedron CrabHedron Crab Life from the LoamLife from the Loam Will of the SultaiWill of the Sultai There are 51 cards that mention the graveyard in some capacity, including these excellent grindy midgame pieces: Teval's JudgmentTeval's Judgment Diviner of MistDiviner of Mist Conduit of WorldsConduit of Worlds Kishla SkimmerKishla Skimmer Finally, you need your closers: Lord of ExtinctionLord of Extinction Afterlife from the LoamAfterlife from the Loam Colossal Grave-ReaverColossal Grave-Reaver The deck is just good, not-so-clean, fun with its constant churning of the yard for hijinks and value
Both make Thopter Tokens for you, but Loyal Apprentice requires you to have your commander on the battlefield, where as Sai triggers off any artifact spell you cast, which means you can generate multiple in a turn
If the result is 0 or less, discard your hand
usually just okay
At the beginning of combat on your turn, create a 1/1 black Rat creature token with "This token can't block." Legendary Creature - Rat Noble Color tag templates(None) Loyal Apprentice Haste Lieutenant At the beginning of combat on your turn, if you control your commander, create a 1/1 colorless Thopter artifact creature token with flying