Ajani, the Greathearted Angrath, Captain of Chaos Arlinn, Voice of the Pack Ashiok, Dream Render Chandra, Fire Artisan Davriel, Rogue Shadowmage Domri, Anarch of Bolas Dovin, Hand of Control Gideon Blackblade Gideon, the Oathsworn Huatli, the Sun's Heart Jace, Arcane Strategist Jace, Wielder of Mysteries Jaya, Venerated Firemage Jiang Yanggu, Wildcrafter Karn, the Great Creator Kasmina, Enigmatic Mentor Kaya, Bane of the Dead Kiora, Behemoth Beckoner Liliana, Dreadhorde General Nahiri, Storm of Stone Narset, Parter of Veils Nicol Bolas, Dragon-God Nissa, Who Shakes the World Ob Nixilis, the Hate-Twisted Ral, Storm Conduit Saheeli, Sublime Artificer Samut, Tyrant Smasher Sarkhan the Masterless Sorin, Vengeful Bloodlord Tamiyo, Collector of Tales Teferi, Time Raveler Teyo, the Shieldmage Tezzeret, Master of the Bridge The Wanderer Tibalt, Rakish Instigator Ugin, the Ineffable Vivien, Champion of the Wilds Vraska, Swarm's Eminence

firstly, it lets you keep the extra cards you draw, but it also removes decision making at the end of a turn, which can help you navigate longer games before burnout hits
Silas's "tax" doesn't apply to Bruse Tarl, so you pay 2RW
Lets start with the mechanics on the cards