Arc Lightning

Legendary power. Prefix, Weapon, Jewel. 2-3% (T1) to 12-16% (T8)

Effect

A hit arcs to up to 3 other monsters within 3 sqm for 30% of it.

Value: the chance on a hit.

On an item: Arc Lightning: 12-16% chance on hit to arc to 3 monsters nearby (T8).

Internal cooldown: 0.7 s.

Cap: at most 30% from all equipped items together.

Tier	Item level	Value	Tier weight
T1	1+	2-3%	100
T2	15+	3-4%	90
T3	30+	4-6%	80
T4	50+	5-7%	65
T5	70+	6-9%	50
T6	95+	8-11%	35
T7	120+	10-13%	22
T8	140+	12-16%	12

Weapons and Jewellery (amulets, rings).

Among every modifier a Legendary item of that kind may roll (weights):

Kind	Weight	Chance
Weapon	3 of 191	1.6%
Jewel	3 of 198	1.5%

A prefix: a rarity allows only so many prefixes and suffixes (see Basics > Rarity).

An item carries each modifier once at most.

A legendary power: only on items of rarity Legendary or better, 1 per item.

Orb	What it does to this modifier
Orb of Awakening	Cannot roll it: the item becomes Common 65% / Uncommon 35%, below Legendary.
Orb of Gilding	Can roll it only when the item becomes Legendary (15%).
Orb of Grafting	Adds it at random on a Legendary or better item without a power, when a prefix is open.
Orb of Upheaval	Rolls every unbound modifier again: it may come or go.
Orb of Fate	New rarity (often none): every modifier rolled again.
Orb of Unmaking	May remove it (one random unbound modifier).
Orb of Excision	Removes it when you pick it on the bench.
Orb of Erasure	Removes it with the rarity and every other modifier.
Orb of Tempering	New value inside its tier (unless bound).
Orb of Reforging	New tier (by item level) and value when you pick it.
Orb of Binding	Binds it: Tempering, Unmaking, Excision, Reforging and Upheaval leave it alone.
Orb of Ruin	40% improve (60% of those: one tier more on every unbound modifier), 60% nothing; it never ruins the item.
Whetstone	Quality multiplies its value: +1% per stone, up to 20% (30% from Divine).