Octarine Core

The Octarine Core is an item purchasable at the Main Shop, under Caster.

Additional Information
Octarine Core grants a total of 450 health, 4.0 health regeneration, 725 mana and 1.0 +100% mana regeneration (and 25 attack damage, to intelligence heroes).

Spell Lifesteal mechanics

 * Abilities that lifesteal
 * All active spells that deal immediate damage or apply damage over time effects
 * Attack modifiers (only the attack modifier part, not the attack part)
 * Cleave, Splash, Bounce
 * Passives that proc on spell use
 * Passives that proc on attack (except bash/backstab/crit)
 * Passives that proc on being damaged/targeted
 * Abilities that straight up kill targets


 * Exceptions to the above rules that do not trigger lifesteal
 * Venomancer's Poison Sting
 * Spectre's Dispersion


 * Abilities that do not lifesteal
 * Summons/Wards
 * Passives or spells that add physical damage directly to attack values
 * Split/Multi shot type attacks
 * Damage amplification
 * HP removal/negative HP regeneration


 * Exceptions to the above rules that do trigger lifesteal
 * Spirit Breaker's Greater Bash as it is not a bash
 * Bounty Hunter's Shadow walk bonus damage (backstab damage is added directly to attack damage)
 * Templar Assassin's Psi Blades because it doesn't fall into any category
 * Templar Assassin's Meld damage is not real backstab-damage
 * Death Prophet's Exorcism uses summons, except not


 * Lifesteal will also work on the items of the octarine cores owner, e.g. Blademail, Radiance, Lotus Orb reflected spells, Dagon, E-Blade, Shiva's, Battle Fury, Maelstrom/Mjollnir, Orb of Venom, Eul's and Diffusal's purge on summons.


 * If you have a Lotus Orb and an Octarine Core the reflected spell will count as if you had cast it thus adding lifesteal from the reflected spell

Trivia

 * Octarine is a fictional color in the comic fantasy book series Discworld, written by the late Terry Pratchett, who died just before Octarine Core was released. The color is described as "resembling a flourescent greenish-yellow purple" and can only be seen by wizards and cats.
 * The components of Octarine Core are the components of pre-6.60.
 * Octarine Core gives the most flat mana in the game.