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

 * Base and
 * Gain permanent +25% . Upon falling below 50% health, gain an Shield 10% of your health. 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 50 in damage to any enemy in its path. Cooldown: 15s
 * Fortifies your Defense 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 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:
 * + 0.2% Defense
 * + 20000-100'000 Seismic Wave Damage
 * +10 from Ghost Absorption Potion
 * +10 from Ghost Absorption Potion

At level 50 you get the following buffs:


 * , for a total of
 * +10% for a total of permanent +35%

When you are the only tank, the buffs change as following:


 * +25% -> +50% permanent
 * Upon Falling below 50% -> 100% health, gain an Shield 10% -> 20% of your health. Note: As the health at which this activates gets increased to 100%, it will always trigger every 90s. It is unknown if this is intended or not.

Armor
For starters and low Budget, Heavy Armor is good enough, and generally sets with high ehp. An Adaptive Armor set can also be viable up to Floor V, but Shadow Assassin Armor is about as good, if not better. Perfect Armor can also be viable, but is also quite costly. Once you get a Floor VI completion, you can start using Necromancer Lord Armor, usually with a Reaper Mask. Once you get a Floor VII completion, and have enough money for it, you can get yourself 3/4 Goldor with a reaper mask, which is also the best set for in the game.

Weapons
Due to the nature of tanks, they don't deal much damage. If you want to use a damage weapon anyways, a Livid Dagger is normally good enough. The main damage source is from the Seismic Wave abilty specially at higher cata levels, so it's viable to use a Earth Shard, which also gives when held. The other three swords that give defense are the Golem Sword, which only gives 25, Wither Cloak Sword and Astraea. If you can afford an Astraea, go for it, but if you can't you can just use a Wither Cloak.

Pets
For the most, a Legendary Blue Whale the best. If you are a Tankzerker and are using a Flower of Truth, then a Baby Yeti can be better, but that's often not the case. If you have a lower Budget, then an epic Turtle Pet is a good replacement for a Blue Whale. As to the Pet Item, if you want to use the Pet for other situations too, then a Dwarf Turtle Shelmet is good, but as tanks already have natural kb inmunity thanks to the Defensive Stance perk, it isn't really necessary.

Reforges
The best armor Reforge for is, by far, Giant. It gives a lot of, which also gets further buffed by the Blue Whale. Using the Perfect Reforge may seem better, specially because of the +2% bonus from it, but even with the Tanks +50%  buff it still is worse. This is due to how gets calculated. From the normal reforges, Titanic is the best.

As for Talisman, you usually don't want to reforge them to give and, as it would kill your damage outside of dungeons too. If you still need those extra stats, then there are some options. If you want to go for the max and, then Shiny is the best, which also gives some. If you want an all-rounder for, , and , then reforge all common talisman to Simple, and the rest to Keen. If you want to have, then use a Rock Candy to apply the Sweet Reforge to all Talisman.

As for swords, there aren't any Reforges that buff or  in any way, so going for highest damage is what is best. As for almost all swords, Fabled, Withered and, since the Strength Nerf, Suspicious, are the best for raw damage. If you want to use one of the normal Reforges, use Sharp if you need more, and Spicy for max Damage.

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.
 * There is a glitch involving the Dwarf Turtle Shelmet's Knockback Inmunity. If during a run you chance from a pet with a Shelmet equipped to one without it, the Tanks Knockback Inmunity from the Defensive Stance perk won't work. The only way to bypass this is ,before the run has started, you equip the pet without the shelmet.