Ray & Temperature
Getting to reach into your deck for a cheap artifact is also a great way to answer problems, or even advance your own plan in some situations
The deck features enter the battlefield triggers including graveyard hate (Angel of Finality), Bolster (Anafenza), artifact/enchantment removal (Angel of the Ruins), creature tokens (Blade Splicer, Emeria Angel, Regal Caracal), flicker (Charming Prince, Restoration Angel, Flickerwisp), reanimate (Emeria Shepherd, Karmic Guide, Sun Titan), venture (Nadaar, Radiant Solar), fetch (Solemn Simulacrum, Ambitious Farmhand), creature removal, life gain, and much much more
The first one is nothing special, but the other one can deal up to 200 damage a turn
Several of his highest-ranking videos state that he has spent thousands of dollars on rare cards or boxes of cards, and he's opened many of them live on YouTube