Volcano

Summon forth a volcano to rain death and destruction over your enemies.

Volcano is the Druid's level 24 Elemental skill, requiring Fissure; it unlocks Armageddon. It is a cast that raises a volcano at the targeted point for 6 seconds: the cone itself burns what stands on it, and it lobs rocks that start fires where they land. Each application is physical plus fire in equal parts, 78–80 of each at level 20, and the two halves have different synergies. The cost is a flat 25 mana behind a 4-second casting delay.

The numbers

• Physical damage is the MinDam/MaxDam columns: 8–10 at level 1, then +2 a level on both ends to level 8, +4 to 16, +6 to 22, +8 to 28 and +10 past that (MinLevDam1–5 and MaxLevDam1–5). 30–32 at level 10, 78–80 at level 20, 158–160 at level 30.
• Fire damage is the EMin/EMax columns with the same base and brackets except the last: +11/+13 a level past 28 (EMinLev5, EMaxLev5), so the two lines are equal to level 28 and the fire pulls ahead after: 160–166 at level 30.
• Duration is 150 frames, 6 seconds, at every level, and casting delay is localdelay 100 frames, 4 seconds; both are constants, so neither is in the table. The Basin notes the delay is local in D2R.
• Range is Param1 = 12 (aurarangecalc par1), the table's "Missile Range". Rocks are lobbed every Param2 = 2 frames (calc4, "Delay between Missiles created").
• Mana is a flat 25.

The damage lines read lvl, so +skills from items raise them; all three synergies read hard points only.

How it works

Volcano is a cast on your cast rate (Casting Speed) and cannot be used as a werewolf or werebear. The Basin's description: a size 3 volcano erupts at the point targeted and applies physical and fire damage to targets standing or moving over it, in its second frame and, because of a 10-frame next delay, every 11 frames after, 14 times over its life; multiply the damage by 25 ÷ 11 for the maximum per second on a target that stands in the cone. It also lobs 62 rocks, the first in the fifth frame and one every two frames after, landing at random inside a 16⅔-yard square centred on the volcano; each makes a size 2 fire that lasts 18 frames (0.72 seconds) and applies the same physical and fire damage. The fires have Last Collide, so one fire normally damages a single target once; two targets close enough to share a fire are hit alternately every 6 frames. When a rock-fire overlaps the cone only the fire's damage and shorter next delay apply, which slightly raises the rate. The physical half goes through Dealing Physical Damage, the fire half through Dealing Elemental Damage.

The physical and fire damage are applied together, so the Basin says a block (Blocking) stops the fire as well as the physical.

Synergies and +skills

Three synergies on two halves of the damage: Molten Boulder, +16% damage per level on the physical (Param7, "Physical Damage synergy", through DmgSymPerCalc = skill('Molten Boulder'.blvl) × par7), and Fissure and Armageddon, +12% fire damage per level each on the fire (Param8, "Fire Damage synergy", through EDmgSymPerCalc = (skill('Eruption'.blvl) + skill('Armageddon'.blvl)) × par8; the table calls Fissure "Eruption"). All read hard points only. The Basin records the older Molten Boulder value, 12% a point. Volcano's own hard points are a synergy for Molten Boulder (+12% physical a point), Fissure (+12% fire a point) and Armageddon.

Against players

A player's hit on another player is cut to 17% of its value (difficultylevels.txt PlayerDamagePercentVSPlayer) before anything else, see Player versus Player. The Basin's page says nothing more about Volcano against players.

Build notes

• Half the damage is physical, raised +16% a hard point by Molten Boulder, so the skill keeps working on fire immunes; the fire half is raised +24% a point by Fissure and Armageddon together.
• The per-application figure is small, 78–80 of each at level 20, but the cone applies it 14 times over 6 seconds to anything that stays put, and 62 rock-fires cover the square around it.
• Four seconds of delay against six of duration means one volcano can always be burning; the cost is 25 mana every four seconds at most.
• Its hard points feed Molten Boulder, Fissure and Armageddon, and the fire tree's prerequisites run through it.