Flying
Whenever this creature deals damage to a creature, this creature deals 3 damage to that creature's controller and 3 damage to you.
Illustrated by Chippy · Seventh Edition · #119
There are no rulings for Bellowing Fiend.
Whenever this creature deals damage to a player, that player discards a card.
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
Whenever a source deals damage to this creature, that source's controller gets a poison counter.
Whenever a creature you control deals combat damage to a player, put that many +1/+1 counters on it.
Whenever this creature deals damage to a player, tap target land that player controls. That land doesn't untap during its controller's next untap step.
Whenever this creature deals combat damage to a creature, that creature's controller loses that much life.
: Regenerate this creature.
Whenever this creature deals combat damage to a player, you gain 1 life and surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
Disguise (You may cast this card face down for as a 2/2 creature with ward . Turn it face up any time for its disguise cost.)