Overcharge

Overcharge is an Immedi-only Rune that can delay a spell to strengthen it, dealing up to 4 times the spell's original damage. Zia will have the Overcharge Rune floating above her while charging, reaching a full charge in 3 seconds and casting itself after 5 seconds. In addition to the modified cost of the spell, Zia pays the spell's base mana cost every second.

Optaining
On the way to Greayleaf after Zia passes the bridge and turns to the south (south of Forest Glade Puzzle), she can pass through the water with the Ice Bridge Spell. There she finds a puzzle with three tourches. To complete it Zia needs to be able to cast the Fireball and the Moving Icebridge spell.

Notable Interactions

 * When used with Trigger Runes, the spell cannot be charged.
 * When linked with At Once, the spell will not trigger until the charge is released.
 * When directly linked with Inverse, the spell deals less damage rather than more, down to 25% of the spell's original damage.
 * When directly linked with Random, the spell will randomly stop charging and cast (20% chance to release every second ).
 * When directly linked with Time, the spell reaches a full charge more quickly (1.5 seconds instead of 3).

Bugs

 * Overcharge does not currently work with Detonate. The spell will explode, but cannot be charged up.