Corrupted — At the beginning of your end step, each opponent who has three or more poison counters exiles the top card of their library face down. You may look at and play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast those spells.
Get opponents to three poison counters fast via toxic and proliferate, then turn Ixhel's corrupted trigger into a card-advantage engine that exiles opponents' libraries and lets you cast those cards with any color of mana. You're a midrange poison/proliferate deck that grinds value while pushing each opponent toward the 10-poison kill.
Built-in repeatable card advantage that steals from all opponents at once
Toxic and proliferate offer a parallel poison win line that dodges life-total math and lifegain
Flying, vigilance evasive body that pressures players while staying back on defense
Color fixing baked in lets you splash and cast anything you exile
Engine does nothing until at least one opponent has three poison, so it's slow to come online
Heavily reliant on the commander; needs Ixhel out repeatedly and is vulnerable to removal
Proliferate/toxic payoffs are narrow and weak in poison-light pods
Can struggle against fast combo before the poison plan matures
Cheap creature that gives every opponent a poison counter at once, jump-starting corrupted on all of them.
Lean harder into proliferate and counter doublers (Atraxa, Vorinclex, Tekuthal, Inexorable Tide) so opponents hit three poison turn after turn and the engine never stalls. Add protection (Grand Abolisher, Heroic Intervention, Swiftfoot Boots) to keep Ixhel sticky, and tighten the mana with fast rocks and dual lands. To raise the ceiling, include efficient infect threats and a few proliferate-based win combos to convert the engine into a fast 10-poison kill.
Legendary Creature — Phyrexian Angel
