Heart of the Mountain

The Heart of the Mountain (HotM) is a skill tree related to.

As players level up their Heart of the Mountain, they will gain Tokens of the Mountain, which can be used to unlock various perks. Some of these perks will take effect only on public islands with new mining mechanism (alongside with infinite Mining Fatigue).

Mechanics
A Heart of the Mountain Menu showing all perks up to Level 7 at max level.

The menu can be accessed via the SkyBlock menu (while inside the Dwarven Mines and Crystal Hollows), via the Mining skill menu, or anywhere via the  command.

Players can level up their Heart of the Mountain tiers by gaining HotM experience, which can be accumulated by completing Commissions and participating in various active mining events (e.g. Goblin Raid). Note that unlocking the whole tree at the same time is not possible, due to the insufficient amount of available Tokens of the Mountain.

Each Commission completed in Dwarven Mines grants 100 HotM experience, and each one completed in Crystal Hollows gives 400 HotM experience. Players receive additional 900 HotM experience from completion of the first four Commissions, if HotM Tier is below 7. Otherwise players earn additional 1,600 Mithril Powder or Gemstone Powder instead, depending on the area.

The Heart of the Mountain can be reset. This wipes all of the HotM upgrades and returns all spent Mithril Powder, Gemstone Powder and Tokens of the Mountain. However HotM tier and Peak of the Mountain levels are kept; thus powder spent on upgrading Peak of the Mountain is not reimbursed. The first reset is free, but each subsequent reset costs. Resetting the HotM has a cooldown of 24 hours.

Perks List
All formulae describe the cost to level up once, e.g. from level 10 to 11. The $$\lfloor x \rfloor$$ symbol means round down to the nearest integer.

Mining Speed
Increases.

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

Mining Fortune
Increases.

Requires Mining Speed.

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

Titanium Insanium
Increases the chance for Titanium Ore to appear upon mining Mithril Ore.

Requires Mining Fortune or Mining Speed Boost.

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

Quick Forge
Decreases the time taken to forge items in The Forge. Upgrading this perk or resetting the tree will affect remaining time on any active forging progress.

Requires Mining Fortune or Pickobulus.

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

Mining Speed Boost
Grants all mining tools a Right Click ability. When the ability is used, is increased by a percentage of the  they had at the moment of activation.

Requires Titanium Insanium or Luck of the Cave.

Pickobulus
Grants all mining tools a Right Click ability. When the ability is used, an explosive projectile is shot. Upon impact, it mines all ores in a radius around the impact.

Requires Quick Forge or Crystallized.

Daily Powder
Increases the amount of Powder granted upon mining the first Mithril ore and Gemstone block of the day. The amount of powder is affected by the 2x powder event. This perk is activated every 24 hours, starting from 00:00 UTC+0.

Requires Mining Fortune.

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

Luck of the Cave
Increases the chance of triggering Golden Goblin, Powder Ghast and Fallen Star spawns upon mining.

Requires Mining Speed Boost or Mining Madness.

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

Crystallized
When a player is near Fallen Stars, increases and gives a chance to deal additional damage to Star Sentries.

Requires Pickobulus or Front Loaded.

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

Efficient Miner
Increases the chance to mine additional blocks of the same ore type adjacent to the mined block. Increases the amount of affected blocks by every 20 levels. does not take an effect on additional mined blocks.

The perk will not trigger when mining within protected areas in the Crystal Hollows (mainly structures housing Gemstone Crystals and some other randomly generated structures).

Requires Daily Powder, Seasoned Mineman or Orbiter.

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

Seasoned Mineman
Increases.

Requires Efficient Miner or Mining Madness.

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

Orbiter
Increases the chance to gain additional experience orbs upon mining ores.

Requires Efficient Miner or Front Loaded.

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

Mining Madness
Grants 50 and 50.

Requires Luck of the Cave, Seasoned Mineman or Goblin Killer.

Front Loaded
For the first 2,500 ores mined in a day, increases by 100 and  by 100.

Requires Crystallized, Orbiter or Star Powder.

Sky Mall
Every SkyBlock day (20 minutes) at 12:00 am, a random buff from the list below is granted. The effects on the list occur less often the further down they are.

Requires Mining Madness.


 * Gain 100
 * Gain 50
 * Increase powder gain by 15%
 * Reduce pickaxe ability cooldown by 20%
 * Increase chance to spawn Golden Goblins while mining ores by 10x
 * Gain 5x drops from mining Titanium

Precision Mining
Increases by 30% on ores with a particle target.

Peak of the Mountain
Grants various HotM-related perks. Upgrading this perk is irreversible, thus Powder spent on upgrading the perk is not returned when resetting the HotM tree.

Requires Efficient Miner.

$$\text{Powder to get to Level n} = 25000 \times n $$

Goblin Killer
Killing Goblins grants additional Mithril Powder depending on the type of Goblin killed.

Requires Mining Madness or Lonesome Miner.

Star Powder
When mining near Fallen Stars, increases amount of Mithril Powder gained from mining Mithril Ore by 3.

Requires Front Loaded or Great Explorer.

Mole
Grants a chance to mine additional Hard Stone blocks while mining Hard Stones. Increases the amount of affected blocks by every 20 levels.

Similar to Efficient Miner, this perk will not trigger when mining within protected areas in the Crystal Hollows (mainly structures housing Gemstone Crystals and some other randomly generated structures).

Requires Efficient Miner.

$$\text{Powder to get to Level n} = \lfloor (n+1)^{2.2} \rfloor $$

Professional
Increases while mining Gemstones.

Requires Mole or Lonesome Miner.

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

Fortunate
Increases when mining Gemstones.

Requires Mole or Great Explorer.

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

Lonesome Miner
In Crystal Hollows, increases the potency of stat boosts to, , , , and (, Superior Dragon Armor, Ender Dragon Pet, etc.)

Requires Goblin Killer or Professional.

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

Great Explorer
Increases the chance to find treasure chests while mining in Crystal Hollows.

Requires Star Powder or Fortunate.

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

Vein Seeker
Grants all mining tools a Right Click ability. When the ability is used, direction to the nearest vein from a player is pointed and gains Mining Spread.

It seems to only point the player to Gemstones. Mining Spread is like Mole and only works on Hard Stone and is disabled when Mole is disabled.

Requires Lonesome Miner.

Maniac Miner
Grants all mining tools a Right Click ability. When the ability is used, a player spends all and gains  for every 10 mana used.

Requires Great Explorer.

Powder Buff
Increases extra Powder gain rate.

Requires Mole.

$$\text{Powder to get to Level n} = \lfloor (n+1)^{3.2} \rfloor $$

Mining Speed II
Increases.

Requires Lonesome Miner.

$$\text{Powder to get to Level n} = \lfloor (n+1)^{3.2} \rfloor $$

Mining Fortune II
Increases.

Requires Great Explorer.

$$\text{Powder to get to Level n} = \lfloor (n+1)^{3.2} \rfloor $$

Rewards
Levelling Heart of the Mountain level, obtaining Mithril Powder and obtaining Gemstone Powder reward Skyblock XP, which is used to level up an important Stat called Skyblock Levels.

Trivia

 * Reaching Heart of the Mountain tier 5 will reward the player with the.
 * 2x Powder Events also double Mithril Powder obtained from Commission rewards, the Daily Powder perk, Fetchur, and Puzzler.
 * However, the Powder Buff perk affects neither.
 * Multiple abilities can be unlocked at once. 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 16,323,038 Mithril Powder and 23,540,045 Gemstone Powder.
 * The Fortunate perk costs Mithril Powder to upgrade unlike the other perks in HotM 6.
 * The Heart of the Mountain is a reference to the Arkenstone from J.R.R. Tolkien's The Hobbit. The Arkenstone is the biggest and rarest gemstone in the Lonely Mountain, and valued most by the Dwarves.
 * The mining exp of the Seasoned Mineman perk is additive with the Refined reforge, the Silverfish Pet's perk, the Mining Fiesta and Derpy's  perk.

History
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