At the beginning of your end step, each player loses 4 life unless they sacrifice a nontoken creature of their choice.
Illustrated by Daarken · Magic Online Promos · #99853
There are no rulings for Bellowing Mauler.
At the beginning of your upkeep, each player sacrifices a non-Vampire creature of their choice.
At the beginning of each player's upkeep, that player sacrifices a non-Elf creature of their choice.
At the beginning of each player's end step, if no creatures died this turn, this creature deals 4 damage to that player.
, Sacrifice a creature: You gain 4 life.
Flying
At the beginning of each player's upkeep, that player sacrifices a creature of their choice. If the player can't, sacrifice this creature.
At the beginning of your upkeep, draw a card unless target opponent sacrifices a creature of their choice or pays 3 life.
At the beginning of each opponent's end step, that player chooses up to two creatures they control, then sacrifices the rest.