, Sacrifice another creature or an artifact: For each opponent, you mill a card, then return that card from your graveyard to your hand unless that player pays 3 life. (To mill a card, put the top card of your library into your graveyard.)
Choose a Background (You can have a Background as a second commander.)
Sivriss turns expendable creatures and artifacts into a repeatable draw-and-drain engine: each activation mills you cards and pulls them back to hand, while opponents bleed 3 life apiece to stop you. Build an aristocrats/sacrifice shell that floods the board with fodder, recur key pieces from the yard, and grind every opponent's life total down while you refuel.
Repeatable card advantage that doubles as group-wide life loss in multiplayer
Self-mill synergizes perfectly with reanimation and graveyard payoffs
Cheap commander at 4 MV that's a value engine without needing combat
Background slot lets you tailor a second commander for protection or aggression
Punishes life-payment effects and stacks with other 'pay life' pressure
Engine is sorcery-speed and tap-gated, so removal of Sivriss shuts it off
Needs a steady supply of fodder—runs dry without token or treasure generation
Mono-black means limited interaction with artifacts/enchantments and no blue card draw redundancy
Symmetrical-ish life loss can paint a target on you politically
Vulnerable to graveyard hate that strands your recursion plan
Legendary Creature — Snake Cleric Warlock
, Sacrifice another creature or an artifact: For each opponent, you mill a card, then return that card from your graveyard to your hand unless that player pays 3 life. (To mill a card, put the top card of your library into your graveyard.)