Diablo Wiki

Diablo casting his Fire Nova.

Flame Circle, also called Fire Nova, is a powerful move used by Diablo. Although it's slightly weaker than Baal's Incineration Nova, the spell deals a lot of damage if it touches the player, so high Fire Resistance is recommended when fighting the Lord of Terror. Unlike Baal's Incineration Nova, the flames Diablo shoots from his body are not semi-transparent.

This ability returns in Diablo III, but with a different animation: Diablo will lift his left leg and smash the floor, creating a nova of large fireballs all over the arena.

Damaging Skills
FireFire ArrowFireballFire BoltFirestormFire WallFlame CircleFlaming SwordHydraIncineration NovaInfernoMeteor
IceArctic BlastBlizzardCold ChargeCold TouchFreezing ChargeGlacial SpikeHoarfrost
PoisonPoison BoltPoison BreathPoison CloudPoison SpitPoison SprayPoison StingPoison Strike
LightningLightningLightning ArrowLightning GlobeRed Lightning HoseShocking HitSpark Defense
PhysicalBlow DartChargeCorpse CannonDestructive StrikeGround TentacleLeapLeech-life BallQuill Dart
MagicBone SpiritHellish ProjectileUnholy Bolt
Non-damaging Skills
Indirect Attack — Blood ManaCursesMana RiftMinion FrenzyPutrifySpin WebStun
Spawning — Bone PrisonFestering AppendagesLay EggReviveSummon Minion
Self-effect — Bone ArmorBurrowFlyFrenzyHealTeleportVile Effigy