Omethyst

Heavy as a rock, hard as steel, Omethyst is really tough. This adamantine monster is hard to defeat, even for the most powerful monsters.

Overview
Omethyst is a very good uncommon tank. He has an insane health stat for an uncommon, a great trait, and a great moveset. It is recommended to use him as your uncommon tank.

Pros:

 * Very high health
 * Great trait for his role
 * Has three life-steal moves, all with very low cooldowns
 * Double damage
 * 25% damage mirror and regeneration so that monsters that OTK him have to also lose a quarter of his health and if he doesn't die in one hit, he gets healed once he gets his turn in
 * An extra turn with a 25% damage mirror
 * Stun and Daze
 * Great relic slot

Cons:

 * High stamina costs
 * Support moves have crazy high cooldowns
 * Meh power and speed (though he is a tank so it is not important)

Maoi Boi
This is the best moveset for Omethyst. Black Rage is there to boost your attacker, but if you are alright without the double damage, Harsh Gouge is your accuracy-lowering move and Misty Consume is your second life steal move which can be used with Dark Devour back to back so that Omethyst heals almost all the time. Impaling Strike is your control move while Sharpened State gives regeneration and damage mirror (it is recommended to use this move on Omethyst himself). Finally, Instant Edged State gives an ally damage mirror while giving Omethyst an extra turn. Using this move and Sharpened State together gives two of your team members damage mirror and one of the pair regeneration.
 * Black Rage / Harsh Gouge / Misty Consume (Rage for Ally Double Damage, 30s, 3CD) / (Gouge for 45 Metal dmg + Daze, 35s, 3CD) / (Consume for 30 Dark dmg + Life steal, 30s, 1CD)
 * Dark Devour (40 Dark dmg + Life steal, 38s, 1CD)
 * Impaling Strike / Sharpened State (Strike for 35 Metal dmg + Stun, 35s, 1CD) / (State for Ally Regeneration + 25% Damage Mirror, 31s, 4CD)
 * Instant Edged State (Ally 25% Damage Mirror + Self Extra Turn, 30s, 4CD)

Recommended Runes: 3 Life; 2 Life, 1 Strength; 1 Life, 1 Strength, 1 Speed.

Recommended Relics: The Earth-Shaking Armour gives Omethyst armour everytime he gets stunned.

Counters

 * Monsters with PER like Gastosquish can remove the effects that Omethyst applies to his team.
 * Heimdal is a great counter to Omethyst. He has light damaging moves with blind so that Onethyst gets more damage and gets blinded so that he has a lower chance for his life steal moves to hit. He also has Magnetize so that his metal moves can deal enough damage to be useful. And if Omethyst has damage mirror, Heimdal can shield himself then do the damage so that the damage that gets reflected gets absorbed by Heimdal's shield.