When Fleshbag Marauder enters the battlefield, each player sacrifices a creature.

Whenever a player sacrifices a creature, you may put a +1/+1 counter on Mortician Beetle.

When Serrated Scorpion dies, it deals 2 damage to each opponent and you gain 2 life.

When Shambling Ghast dies, choose one — • Brave the Stench — Target creature an opponent controls gets -1/-1 until end of turn. • Search the Body — Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) Cycling—Pay 2 life. (Pay 2 life, Discard this card: Draw a card.)

Troll of Khazad-dûm can't be blocked except by three or more creatures. Swampcycling {1} ({1}, Discard this card: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.)

As an additional cost to cast this spell, sacrifice a creature. Draw two cards.

Add {B} for each creature card in your graveyard.

As an additional cost to cast this spell, sacrifice a creature or discard a card. Destroy target creature or planeswalker.