Octarine Core

The Octarine Core is an item purchasable at the Secret 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
The following abilities can lifesteal with Spell Lifesteal

1 The instantly killing effect of these spells also triggers Spell Lifesteal, healing based on the killed unit's remaining health.

2 Despite these spells using separate units to apply their effects, the damage sources of those are set on the caster, so Spell Lifesteal procs and heals.

3 The rum wear-off health loss does not proc Spell Lifesteal.

4 Techies still dies.

5 Does not lifesteal off of the area health cost. Only steals life when targeting an enemy to damage it.

The following abilities do not lifesteal with Spell Lifesteal

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 same components of pre-6.60.
 * Octarine Core gives the most flat mana in the game.