Warmaster Thalassa

Thalassa ruled the Water Realms until she had to go with the other Warmasters. She left the realms in the hands of her daughter Thetys and her lieutenant Hydratila, but the war between the two of them divided the population. Now Thalassa has returned and she must reunify the Water Realms.

Role: Denier 

Overview
Warmaster Thalassa is one of, if not the the best denier in the game who specializes in Mega Freeze, PER, Trait Disabled, Drowned, and Freeze.

Pros:
 * Amazing stats and trait
 * Amazing Special - AoE PER + Trait Disabled + Mega Freeze + Drowned
 * Team Freeze Hater + NER + self Extra Turn
 * Team Freeze Hater and Precision
 * Lots of Freeze and Mega Freeze
 * Drowned

Cons:
 * Trait is not very good compared to most Warmasters (though that isn't saying much)
 * High cooldowns and stamina costs

The Mean Queen

 * High Pressure Fluid (PER + self Extra Turn, 23s, 2 CD)
 * Abyss Bottom (PER + Trait Disabled + AoE MegaFreeze, 49s, 4 CD)
 * Plankton Eater (Trait Disabled + self Extra Turn, 36s, 4 CD)
 * Thalassa's Chosen (Single ally NER + Freeze Hater + self Extra Turn, 30s, 2 CD)

She is a maximum denier + support. If she goes first, you can start to do the freeze hater, then continue with Extra Turn until all the allies have freeze hater.

Recommended Runes: 3 Speed

Frozen to the Bone

 * High Pressure Fluid
 * Arctic Waves (AoE 30 Water dmg + Freeze + Drowned, 33s, 2 CD)
 * Cryotan Breath (AoE 35 Water dmg + MegaFreeze, 46s, 3 CD)
 * Crowd Refresh (Team Precision and Freeze Hater, 26s, 0 CD)

Recommended Runes: 3 Speed

Unranked

 * High Pressure Fluid
 * Arctic Waves
 * Thalassa's Chosen
 * Abyssal Pressure (30 Water dmg + Mega Freeze + AoE residual damage)

Recommended Runes: 3 Speed

Counters

 * Anticipation monsters such as Zeighar, Narok, and Marquis de Flambe can counter her extra turn moves. Also, pair them up with a Tank such as Mephisto or another Anticipation monster so that she can't trait disable you that easily!
 * CDA users such as Storm Beard, Sunblast, and Warmaster Sherezar can render Thalassa useless due to her huge cooldowns.
 * Strong Thunder attackers such as Warmaster Babari, Olnir, and Talany and finish her off easily due.