Firebird's Eye is a Source piece of the Firebird's Finery set in Diablo III.
It only drops at character level 70, and only at Torment difficulty. It always increases damage of all Fire skills.
Stats (Level 70)[]
Ironically, the guaranteed bonus to Fire skills on this item does not apply to the damage done by the set bonuses of Firebird's Finery, which are not skills. The set bonus damage accounts for a large part of the overall damage for most of the set's build, so this Magic Property is often re-rolled to a more relevant one.

Firebird's Eye
Set Source
Properties:
- +[340 - 370]–[380 - 450] Damage
- Fire skills deal 15% - 20% more damage.
- +626 - 750 Intelligence
- +4 Random Magic Properties
Set Bonuses:
- Disintegrate ignites enemies, causing them to take 3000% damage as Fire until they die. If the character dies, a Meteor will fall from the sky to revive them (60 seconds cooldown) (2 pieces)
- Casting Disintegrate adds Combustion stacks that reduce the cooldown of Teleport by 2% per stack, stacking up to 50 times. The Wizard gains 80% damage reduction while maintaining any Combustion stacks (4 pieces)
- The Wizard gains +5000% increased damage if any enemies are Ignited. Hitting an Ignited enemy with a non-channeling Fire spell deals 3000% damage as Fire for each Combustion stack (6 pieces)
"This orb is nothing less than a super spun energy gyre. Arcane and even thermal energies can be sealed within its eddies for long periods of time and then as the spin is reversed those energies unspool and may be employed." — Magus Arrin Eberhart