Budget Alternatives to Shepherd of Rot

Skirsdag Supplicant $0.04 2B · Human Cleric {B}, {T}, Discard a card: Each player loses 2 life. Blightspeaker $0.04 1B · Human Rebel Cleric {T}: Target player loses 1 life. Sarevok, Deathbringer $0.05 3B · Human Knight At the beginning of each player's end step, if no permanents left the battlefield this turn, that... Burden of Greed $0.06 3B · Instant Target player loses 1 life for each tapped artifact they control. Orzhov Guildmage $0.08 W/BW/B · Human Wizard {2}{W}: Target player gains 1 life. Maggot Carrier $0.09 B · Zombie When this creature enters, each player loses 1 life. Devouring Greed $0.14 2BB · Arcane As an additional cost to cast this spell, you may sacrifice any number of Spirits. Stronghold Discipline $0.15 2BB · Sorcery Each player loses 1 life for each creature they control. Emissary of Despair $0.15 1BB · Spirit Flying Stern Judge $0.19 2W · Human Cleric {T}: Each player loses 1 life for each Swamp they control. Spiteflame Witch $0.19 1B/R · Elemental Shaman {B}{R}: Each player loses 1 life. Rathi Fiend $0.19 3B · Phyrexian Horror Mercenary When this creature enters, each player loses 3 life. Grave Consequences $0.23 1B · Instant Each player may exile any number of cards from their graveyard. Ravenloft Adventurer $0.35 3B · Human Rogue Assassin When this creature enters, you take the initiative. Blood Tyrant $0.35 4UBR · Vampire Flying, trample Season of Loss $0.72 3BB · Sorcery Choose up to five {P} worth of modes. Guiltfeeder $1.03 3BB · Horror Fear