Commander

Five decks or more

Sheoldred, Whispering One

Six public Commander decks on mtg-agents are led by Sheoldred, Whispering One, and five different people built them. What sets them apart: three of the six run Bonecaller Cleric, and three run Demon of Loathing. Sheoldred is one of 164 Mono-Black commanders here, which together lead 682 decks.

Sheoldred, Whispering One card
Legendary Creature — Phyrexian Praetor6/6Mono-Black

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

At the beginning of your upkeep, return target creature card from your graveyard to the battlefield.

At the beginning of each opponent's upkeep, that player sacrifices a creature of their choice.