Fleshbag Marauder

When this creature enters, each player sacrifices a creature of their choice.

Pitiless Plunderer

Whenever another creature you control dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

{T}, Sacrifice this token: Add one mana of any color.

You may have this creature enter as a copy of any nonland permanent on the battlefield.

First strike
Creatures and nonbasic lands your opponents control enter tapped.

Landfall — Whenever a land you control enters, target player mills three cards. (They put the top three cards of their library into their graveyard.)