Tank

Tanks are a dungeon class that specializes in Effective Health and being able to take large amount of damage and keeping mobs off their teammates.

Class Passives

 * Gain a permanent +25% Total . Upon falling below 50% health, gain a 10% health absorption shield. Cooldown: 90s
 * Increases the chance for mobs to target you when you are above 25% HP.
 * Divert 80% of the damage taken by your teammates within 30 blocks around you.
 * Grants immunity to knockback from mobs.

Dungeon Stone Abilities

 * A Seismic Wave emerges from underneath you and travels in a straight line. Deals 20000 + 10% every in damage to any enemy in its path. Cooldown: 15s
 * Fortifies your defence by giving a 70% damage reduction for 20 seconds. Also aggros all enemies in a 10 block radius. Cooldown: 150s..

Ghost Abilities

 * Throw a potion which temporarily stuns all monsters in a 10 block radius.
 * Throw a potion which gives all teammates in a 10 block radius 200.0 for 3 seconds.

Leveling Bonus
You can level up the tank class while playing as a tank or if you have a teammate that is tank, you get some tank XP as a team bonus.

For every tank level up to level 50 you get:
 * + 1 Defense
 * + 0.2% Total Defense
 * + x Seismic wave damage (depending on what level)
 * + 10 Absorption Health

Milestones
Tank class can reach its milestones by tanking and dealing damage in the dungeon. Refer here for a table showcasing class milestones.

Trivia

 * The Castle of Stone perk is a reference to the guardian skill Castle of Stone from Log Horizon, of which grants one immunity to damage for a short duration. The perk itself does more resemble the guardian skill Anchor Howl, of which aggros enemies and grants one increased defense for a short duration.