Revision as of 15:31, 4 December 2019 by JokerPixel(talk | contribs)(It's very ambiguous whether it's the item ("deals") or the beams themselves ("deal") that are massively damaging, but after thinking on it for a while, I'm siding with "deal".)
Azazel suffers from the shortest range of all characters; this is balanced with flight, additional power per hit via his Brimstone-like attack, and significant damage to all enemies in the room upon the loss of a Black Heart, killing most lesser enemies.
Due to his flight, Azazel takes damage only when leaving a curse room, not when entering, effectively letting him use these rooms at half-price. Additionally, he can use the Fool card he starts with to avoid the cost for one room entirely.
It is possible to slightly increase attack range by taking range-increasing items.
Despite his lack of Heart Containers, unlike ???, Azazel can gain Heart Containers. Thus, health-increasing items are useful.
With enough range, acquiring homing tears will make Azazel's Brimstone home in on enemies.
Good Items
20/20 doubles lasers without increasing tear delay.
Abaddon aside from the lack of angel rooms, it provides no downside, given Azazel still has no Heart Containers. As it costs 3 soul hearts, it will add 3 black hearts to his health bar, increase damage and speed, and give his Brimstone laser a fear effect.
The Ludovico Technique gives a Brimstone ring, whether Azazel has the short or long-ranged version of it, giving him the ability to damage many enemies at a time due to its size and negates Azazel's short range, but halves Azazel's damage.
Mom's Eye allows Azazel to shoot two beams, one of which is shot behind him.
Monstro's Lung gives several additional Brimstone beams around Azazel.
My Reflection greatly increases the range of Azazel's brimstone.
Greatly increases the Brimstone laser's range and makes the laser curve as Azazel moves around the room.
Number One slightly decreases Azazel's range but significantly decreases the charge time of Azazel's Brimstone. Also turns Azazel's laser yellow.
Proptosis doubles the Brimstone laser's damage without any downsides.
The beam will decrease in damage the further it travels, but Proptosis still greatly increases damage at close range.
Rubber Cement allows Azazel's laser to bounce off of walls. Unlike Azazel's normal mini-Brimstone, beams that bounce off of walls have infinite range, but deals half of damage.
The beam will no longer turn into normal Brimstone upon bouncing off a wall. It will instead turn into his mini-Brimstone.
Sad Bombs shoots 10 short-ranged Brimstone beams around the explosion point, which deals enormous amounts of damage.
Tammy's Head shoots 10 short-ranged Brimstone beams around him, which deal enormous amounts of damage.
Tape Worm greatly increases the Brimstone laser's range.
Technology along with a physical change in the brimstone, damage is increased.
Technology 2 provides a laser while Brimstone is charging, allowing the player to do damage while the charge occurs. However, this also decreases the damage of Azazel's Brimstone.
Tiny Planet changes the path of Azazel's Brimstone into a circle, giving it an area of effect. The range increase becomes especially powerful if you add a homing tears effect.
Items that break rocks, like Leo or Thunder Thighs nullify part of the advantage Azazel gains from flight as he will no longer be able to hover over them to avoid enemy projectiles.
In the Bible, Azazel is the name given to the goat that was cast into the wild as part of Jewish atonement rituals. However, in certain traditions of Abrahamic religions, Azazel refers to the fallen angel who taught people to make weapons and jewelry and taught women the "sinful art" of painting their faces, as mentioned in the apocryphal Book of Enoch. Azazel is referenced three times in the Bible; this may be why he spawns with three black hearts.
Azazel's starting health is listed as "-1" on the character selection screen.
Brimstone, the ability to fly, the card 
0 - The Fool, and three black hearts without any regular heart containers; however, unlike ???, Azazel can still obtain heart containers with items.
20/20 doubles lasers without increasing tear delay.
The beam will no longer turn into normal Brimstone upon bouncing off a wall. It will instead turn into his mini-Brimstone.
Characters 
The Binding of Isaac: Rebirth
