Starting intensity 1

Whenever Bellowsbreath Ogre attacks, it deals damage equal to its intensity to any target, then perpetually increase its intensity by 1.

When Blight-Breath Catoblepas enters the battlefield, target creature an opponent controls gets -X/-X until end of turn, where X is your devotion to black. (Each in the mana costs of permanents you control counts toward your devotion to black.)

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Green creatures have "Cumulative upkeep ."

Enchant creature you control

When enchanted creature deals combat damage to a player, sacrifice it and attach Breath of Fury to a creature you control. If you do, untap all creatures you control and after this phase, there is an additional combat phase.

Breath of Malfegor deals 5 damage to each opponent.

Breath Weapon deals 2 damage to each non-Dragon creature.

Flying, soulbond (You may pair this creature with another unpaired creature when either enters the battlefield. They remain paired for as long as you control both of them.)

As long as Breathkeeper Seraph is paired with another creature, each of those creatures has "When this creature dies, you may return it to the battlefield under its owner's control at the beginning of your next upkeep."

: Breathstealer gets +1/-1 until end of turn.

2 — Prowess, prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn twice.)

5 — , : This permanent deals 2 damage to any target.

2 — 4/2

4 — 4/8

Enchant creature

: Enchanted creature gets +1/+0 until end of turn.

Flash (You may cast this spell any time you could cast an instant.)

Enchant creature

: Enchanted creature gets +1/+0 until end of turn.

: Return Ghitu Firebreathing to its owner's hand.

, Sacrifice another nontoken creature: Create a 1/1 white and black Spirit creature token with flying.

Afterlife 3 (When this creature dies, create three 1/1 white and black Spirit creature tokens with flying.)

Flying

, : You may tap or untap target creature.

Until end of turn, each creature you control becomes a black Shade and gains ": This creature gets +1/+1 until end of turn."

Flying, haste, protection from white

: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)

When Stormbreath Dragon becomes monstrous, it deals damage to each opponent equal to the number of cards in that player's hand.

Creatures your opponents control get -1/-1 until end of turn. The Ring tempts you.

Unbreathing Horde enters the battlefield with a +1/+1 counter on it for each other Zombie you control and each Zombie card in your graveyard.

If Unbreathing Horde would be dealt damage, prevent that damage and remove a +1/+1 counter from it.