Avalanche

Avalanche is a Might skill, introduced in Reaper of Souls.

In-game
Avalanche allows the Barbarian to let out a huge roar and call down a pile of rock and debris to fall from above. The area is roughly 15 yards in radius, and can be summoned anywhere within 60 yards of the Barbarian. The damage is not instant, but rather dealt over 4 seconds.

Spending Fury by any means reduces the remaining cooldown; this Fury does not have to be spent in a single use, and may even be spent within unlimited time to count towards the reduction.

Runes

 * Volcano: Damage type changes to Fire, and instead of calling a rockfall, creates a small volcano. It spits molten rocks at random points within yards, dealing  damage as Fire over  seconds. Each rock hits a small area ( yards radius) (unlocked at level 62).
 * Lahar: Reduces the amount of Fury that must be spent to reduce the cooldown by second to  (unlocked at level 63).
 * Snow-Capped Mountain: Damage type changes to Cold, and instead of calling a rockfall, creates two clashing waves roughly yards long and  yards apart that move towards one another. Enemies caught between the two waves are pulled in the middle every second, and are Chilled by  for  seconds. Total damage and duration are changed to  over  seconds (unlocked at level 67).
 * Tectonic Rift: Stores up to charges of Avalanche at a time, gaining one charge every  seconds; time to recharge is still reduced by spending Fury (unlocked at level 67).
 * Glacier: Damage type changes to Cold, and affected enemies are also Frozen for seconds (unlocked at level 69).

Non-rune enhancements

 * Dread Iron (Legendary Belt): Ground Stomp also summons an Avalanche at the same location, ignoring cooldown of the regular skill, and increases Avalanche damage by +150-200%.
 * Blade of the Tribes (Legendary Two-Handed Mighty Weapon): increases damage by 600-800%, and and Threatening Shout summon an Avalanche.
 * Might of the Earth Set (Set Bonus for 2 items): reduces the remaining cooldown by 1 second for every 30 Fury spent. This effect stacks with the similar reduction in-built into Avalanche.
 * Might of the Earth Set (Set Bonus for 6 items): increases damage by 20000%.

Passives

 * Earthen Might: Also gain Fury on each cast.
 * No Escape: deals additional damage to enemies at least  yards from the Barbarian.