Heart of the Mountain

Description
The Heart of the Mountain (HotM) is a skill tree from the Dwarven Mines update.

As players level up their Heart of the Mountain, they will gain more Heart of the Mountain tokens, which can be used to unlock various perks.

All of the Heart of the Mountain upgrades ONLY work on public islands. They don't work on private islands.

Heart of the Mountain Menu
A Heart of the Mountain Menu showing all perks at max level. Note that this tree is not possible due to insufficient Heart of the Mountain Tokens.

Tiers
Players can level up their Heart of the Mountain by gaining Heart of the Mountain Experience, which can be obtained from Commissions and from events such as Raffle and Goblin Raid.

The first four Commissions players complete every day will give an additional 900 HotM experience for a total of 3,600 extra experience. Note that once the player reaches Heart of the Mountain 5, they will gain extra Mithril Powder instead of HotM experience.