Heart of the Mountain

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 Tokens of the Mountain for unlocking various perks. These perks will take effect only on public islands.

Heart of the Mountain Menu
A Heart of the Mountain Menu showing all perks at max level. Note that unlocking the whole tree isn't possible at the same time, due to insufficient Tokens of the Mountain available. The menu can be accessed via the SkyBlock menu (only while inside the Dwarven Mines), via the Mining skill menu or via.

Gaining Heart of the Mountain Experience
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.

Experience for Each Tier
The minimum amount of Commissions needed to get this much HoTM XP is 112, if you only complete Commissions with the daily bonus, which would take 28 days to complete.

Powder Costs
$$ \text{Note: The} \lfloor x \rfloor \text{ symbol or floor means round down to the nearest whole number.} $$

Crystallized
$$\text{Powder to get to Level n} = \lfloor(n+1)^{3.4}\rfloor $$

Daily Powder
$$\text{Powder to get to Level n} = 182 + 18 \times n $$

Efficient Miner
$$\text{Powder to get to Level n} = \lfloor(n+1)^{2.6}\rfloor $$

Luck of the Cave
$$\text{Powder to get to Level n} = \lfloor(n+1)^{3.07}\rfloor $$

Mining Fortune
$$\text{Powder to get to Level n} = \lfloor(n+1)^{3.05}\rfloor $$

Mining Speed
$$\text{Powder to get to Level n} = (n+1)^3 $$

Orbiter
$$\text{Powder to get to Level n} = 70 \times n$$

Peak of the Mountain
$$\text{For levels 2-5, Powder to get to Level n} = 25000 \times n $$

Quick Forge
$$\text{Powder to get to Level n} = (n+1)^4 $$

Seasoned Mineman
$$\text{Powder to get to Level n} = \lfloor(n+1)^{2.3}\rfloor $$

Titanium Insanium
$$\text{Powder to get to Level n} = \lfloor(n+1)^{3.1}\rfloor $$

Tips

 * At Heart of the Mountain 2, it is recommended to unlock Titanium Insanium to make Titanium Commissions significantly easier.
 * At Heart of the Mountain 3, it is recommended to get the Mining Speed Boost ability and to spend the last token on either Daily Powder or Luck of the Cave.
 * At Heart of the Mountain 4, it is recommended to get Efficient Miner and to spend the last token on either Luck of the Cave or Seasoned Mineman.
 * At Heart of the Mountain 5, it is recommended to get Peak of the Mountain and to max it to obtain 2 more Tokens of the Mountain. Then, players can go through the Mining Speed Boost to get Sky Mall and Goblin Killer. The final token should be spent on either Quick Forge or Seasoned Mineman.

Trivia

 * 2x Powder Events also double Mithril Powder obtained from Commission rewards, the Daily Powder perk, Fetchur, and Puzzler. This is particularly sensible to exploit once at Heart of the Mountain 5 as the first few Commissions of the day reward 2004 powder.
 * The Mithril Powder from the Daily Powder perk resets once every real life day, not every Skyblock day.
 * While it is possible to have both Abilities unlocked, it is slightly convoluted to use both. Players must use one ability then select the other in the Heart of the Mountain Menu in order to use it.
 * Despite being impossible to get every single perk in Heart of the Mountain, if one were to get all of them and max each one out, it would cost 16,223,038 Mithril Powder.
 * At 1 powder per second (86400 per day) this would take about 187 days to get this amount of powder.
 * It's possible to completely reset the HotM skill tree, refunding tokens and all mithril powder (except powder spent on Peak of the Mountain). It's free for the player's first reset and 100,000 coins for subsequent resets. Resetting the tree has a cooldown of 24 hours or 1 real life day.
 * The Ability cooldown is set to 1 minute, whenever you change servers, regardless if the cooldown has just ended or just started, in order to prevent server swapping.