It doesn't matter whether you control an artifact, whether you can pay 1 life, or whether Spire of Industry is untapped
Even worse for them, any card that hits their graveyard (unless you controlled it) is exiled instead, and Valgavoth lets you cast those exiled cards later for just life instead of mana
Extra land drops also are fantastic for us, and these are two of the least expensive (mana-wise, not wallet-wise) ways to do it consistently
The trick to making Empty the Pits good in a control deck is finding ways to draw cards or kill your opponents creatures without putting pressure on your own graveyard
8 Unyielding Gatekeeper None Shall Pass Disguise is one of the main new mechanics from Murders at Karlov Manor, letting you place cards face down on the battlefield as a 2/2 creature with ward 2
Anything that boosts up your number of Knights, such as a card which creates Knight tokens, is perfect for this." Where the design process began: "Knights span red, white, and black