Heres the real kicker: Once youve sufficiently staxd yourself up with Lich's Mirror or Lich's Tomb, or maybe once you have Phyrexian Unlife in play alongside Solemnity to make you nigh unkillable, you can pay all of your life into Wall of Blood or Fire Covenant
This cycle is similar to previous split card cycles, especially the one issued in Dragon's Maze
Each time you exile a creature, you pile counters onto one of your symbiotes, which quickly turns them into massive threats
Liege of the Pit Lord of the Forsaken Lord of the Pit Maha, Its Feathers Night Mindwrack Demon Minion of the Wastes Mosswood Dreadknight Nameless Race Necravolver Ob Nixilis, Unshackled Oni Possession Ormendahl, the Corrupter Phantom Train Phyrexian Librarian Phyrexian Negator Phyrexian Obliterator Razaketh, the Foulblooded Rite of Belzenlok Rot-Curse Rakshasa Savanti Romero, Time's Exile Scion of Darkness Soulflayer Spawn of Mayhem Spirit of the Night Subversive Acolyte Sutured Ghoul The Fire Nation Drill The Grim Captain The Speed Demon Thought Gorger Tragedy Feaster Tyrannical Pitlord Urborg Scavengers Vile Mutilator Void Maw Wave of Rats Withengar Unbound Wretched Bonemass Xathrid Demon
Ultimately, Wizards simply believe that cards that can be cast for free with alternative payments are too fast for Historic
Haste is a fantastic ability and is one of my favorite evergreen keywords in MTG