The Diablo 2 Wiki
The Diablo 2 Wiki archive is available for anyone looking for information on Diablo 2. All information here is pre-D2R but contains a lot of useful information that is still relevant. Updated sections for new D2R features can be found on the PureDiablo Diablo 2 section

Volcano

From Diablo 2 Wiki

Volcano is a level 24 skill from the Druid's Elemental Skill Tree.

Volcano

Volcano.jpg

Casting Delay: 4 Seconds

Required Level: 24
Prerequisites: Firestorm, Molten Boulder, Fissure
Synergies: Volcano is boosted by the following synergies:

Details: A more powerful version of Fissure, the Volcano erupts from one point and deals substantial fire damage to everything in the vicinity.

Targets in the radius of effect from the Volcano take fire damage per second, but if they get hit or not is largely random. One monster can die immediately while another could last the entire Volcano with only minor damage. Where the little fireballs land has nothing to do with which monsters take damage; the graphical effects are just eye candy.

Mana Cost: 25
Skill Level Progression [e]
Slvl Damage

Fire Damage

Slvl Damage

Fire Damage

Slvl Damage

Fire Damage

Slvl Damage

Fire Damage

1 8-10 8-11 6 17-20 20-22 11 33-35 38-40 16 56-58 60-62
2 8-11 11-13 7 20-22 22-24 12 38-40 42-44 17 60-62 67-69
3 11-13 13-15 8 22-24 24-26 13 42-44 47-49 18 67-69 73-76
4 13-15 15-17 9 24-26 29-31 14 47-49 51-53 19 73-76 80-82
5 15-17 17-20 10 29-31 33-35 15 51-53 56-58 20 80-82 87-89