The resulting new Boros Burn archetype has claimed 8.7% of the winner's metagame over the past week
Lifegain for lifegains sake is usually bad, and cards that provide pure lifegain usually aren't playable

Bloodhall Priest Boomer Scrapper Charforger Coalstoke Gearhulk Corpse Explosion Demonic Dread Drach'Nyen Fevered Suspicion Fireglass Mentor Flamewar, Streetwise Operative Florian, Voldaren Scion Graywater's Fixer Hidetsugu Consumes All Hungry for More Hurl Through Hell Immersturm Predator Invasion of Azgol Kathari Bomber Kefka, Dancing Mad Kroxa, Titan of Death's Hunger Laughing Jasper Flint Lidless Gaze Lucius the Eternal Magar of the Magic Strings Mishra, Claimed by Gix Mishra, Tamer of Mak Fawa Mordor on the March Ob Nixilis, Captive Kingpin Olivia, Crimson Bride Prosper, Tome-Bound Rakdos Charm Rakdos Guildmage Rakdos, the Muscle Rivaz of the Claw Sarcatog Shadow Urchin Shambling Remains Slaughter Games Terminal Agony The Balrog of Moria The Infamous Cruelclaw The Master, Gallifrey's End The Master, Multiplied The Ruinous Powers Theater of Horrors Thought Hemorrhage Tibalt, Cosmic Impostor Underworld Cerberus Wake the Dragon Wake to Slaughter Witch-king, Sky Scourge Zuko, Conflicted

Take 59 Flights of Stairs - Tap up to three target creatures