Fluffy

position:: #46
roles:: support, mage
obtention:: unobtainable* (temporary)
basic attack:: 28,940 (100% physical attack)
artifact:: +50,190 magic defense

health: 557,020
power: 179,218
agility: 2,410
strength: 3,065
intelligence: 19,036
accuracy...: 19,036
crit resistance...: 19,036
crit chance...: 0
vampirism: 0

magic attack: 114,951
magic penetration...: 20,746
physical attack: 28,940
armor penetration...: 0
magic defense...: 34,097
armor...: 35,422
dodge...: 0

Presentation

A possessed sheep primarily used as a counter to Seb. He interrupts ults, mass resurrects his team and himself, reflects basic attacks, and explodes on his death.

Skills

Deal with the Devil (ultimate, white)

Hellfire envelops all allied Heroes for 12s. While active, allies are immune to damage from enemy basic attacks and reflect it back to attackers - up to 117,961 total reflected damage.
Each second, Hellfire deals damage to allies equal to 1% of their maximum Health.
Maximum reflected damage: 117,961 (80% magic attack + 200 * level)

To Hell and Back (periodic, green)

Baalthazar protects his flock from death for 10s. All allies who die during this time will be resurrected when the effect ends. They restore 281,902 Health, and their physical and magic attack are increased by 29,490 until the end of the battle.
Healing: 281,902 (200% magic attack + 400 * level)
Attack increase: 29,490 (20% magic attack + 50 * level)
Cooldown*: 40s
Initial cooldown*: 10s

Mark of Death (periodic, blue)

Fluffy puts Marks of Death on himself, increasing his magic armor penetration by 6,498. When Fluffy dies, the Marks explode, dealing 100,718 damage to enemy Heroes for each Mark.
Up to 10 Marks can be active at once.
Damage per Mark: 100,718 (65% magic attack + 200 * level)
Magic armor penetration per Mark: 6,498 (5% magic attack + 5 * level + 100)
Cooldown*: 10s

Usurpation (periodic, violet)

When an enemy uses an ultimate ability, Fluffy cancels it and deals 77,076 damage to them. At the same time, Fluffy takes damage equal to 20% of his maximum Health.
This ability can trigger once every 20 seconds.
The chance to cancel an ultimate ability is reduced if the target's level exceeds 130.
Damage to enemy: 77,076 (50% magic attack + 150 * level + 100)
Self-damage: 20% (-0.15 * level + 39.5) of maximum Health
Cooldown*: 20s
Initial cooldown*: 1s

Discussion

Core Mechanics

He prevents one ultimate every 20s, starting at the very beginning. This can prevent Dante jumping, or Sebastian singing. This is very helpful for Augustus or Arachne
He periodically casts a mass resurrection, at 20s/60s/140s, reviving allies who died during the last 10s. On top of that they keep their energy, likely inflated by the hit that just killed them! And they get permanently buffed! And it works even when Fluffy is dead, so he resurrects himself! Cheat skill
On his death all enemies will suffer a strong magic explosion. It becomes stronger every 10s, threatening to wipe out the enemy team if things linger
His ult reflects basic attacks. This will happen too late to protect the tank from Ishmael, however Lara's aoe skill may trigger it, causing a sometimes deadly revenge. Note however this ult slightly harms his allies (12% hp over 12s), so he may not be a very good babytank

Lore

Fluffy is a demon mistakenly trapped into the body of a sheep, after the ritual got interrupted by our heroes. Yep, those sort of things happen!
He was apparently the previous Archdemon, likely before he was overthrown by the current holder of this title

Counters

It is usually better to focus on the damage dealers. Fluffy will die when his turn comes
Corvus' altar can kill him by retaliating against Fluffy's reflection of basic attacks (thanks to Olympus)
Morrigan, Jet and Cascade stop his mass resurrection. Even though animations are sometimes misleading about the exact timing
Seb, when at the very back and using the War Flag of Readiness, will ult at the very beginning despite Fluffy, before his first basic attack. Note this requires a maxed Seb and an attack pattern, in order to start with enough energy

Patronage

Axel is usually the best choice given Fluffy's vulnerability, and since he is too easily one-shot
Khorus and his shield are decent, but Fluffy does not always generate a lot of damage before his death
Merlin only affects Mark of Death, so the benefit is thin
Biscuit synergizes well with Fluffy's ult to prevent enemy healing, but its usage is situational: will Fluffy ult at the right time against a given enemy, and is there another teammate who can use this pet better?

Stat Priority

Focus on health. While magic attack will increase his post-resurrection healing, Fluffy cannot always count on it
You can usually ignore armor and magic defense, as they will always be too low: see zerodef