Tassia the Lost guide: skills, build and team roles
Overview
Tassia the Lost is a Legendary Water Freeborn Support in Invokers: Titan Legacy. She covers several jobs in one Invoker: targeted healing, cleansing, ATK Down, control against vulnerable enemies and, after one specific upgrade, a revive. That flexibility is the reason to build her, though each job comes with conditions you should know before building a team around her.
Her heal scales from ATK, so ATK matters on her. Fully Awakened and before Gear, Tassia has 953 ATK, 741 DEF and 11,060 HP. Her ATK is among the highest of any Support and her HP is high.
Skills To Prioritize
Watchful Eye heals the ally with the lowest current HP and removes random debuffs from that ally. It isn't an AoE heal, and it can't cleanse a target you choose. Thalassic Terror attacks a group around a selected enemy and places ATK Down and Shock. Blinding Storm Launches enemies in a wide area and places Blind, while Seasick reduces one enemy's Combo SPD.
These effects solve different problems. ATK Down reduces ATK-based threats, Blind gives Combo Attacks a chance to miss, and Shock or Launch can interrupt vulnerable enemies. None of them cuts every form of incoming damage.
Blinding Storm Level 6 adds a revive for one fallen ally at 30% HP. That's a big change, and the first upgrade to aim for when building Tassia for recovery. Levels 1 to 5 don't include the revive. Level 10 isn't the unlock, and Max Level doesn't turn it into a team-wide revive. The Level 6 Ultimate also has a 6.8-second Launch and 14% Blind for 14 seconds, with a 1,075 Mana cost. Level 10 reaches 18% Blind for 18 seconds and costs 1,050 Mana, while Max Level extends the Launch to nine seconds and lowers the cost to 1,000 Mana. Those improvements help her control and Ultimate access, but the revive stays one ally at 30% HP.
Watchful Eye Level 6 is the second upgrade worth aiming for: it removes two random debuffs instead of one. Later levels improve both the healing and how often she can cast it. At Level 10 it heals for 500% of Tassia's ATK on a 15-second cooldown; Max Level reaches 600% ATK and 13 seconds. Because the heal scales from ATK, ATK is worth building, though staying alive comes first.
Thalassic Terror starts at 25% ATK Down for eight seconds. It reaches 40% for 14 seconds at Level 10 and 45% for 14 seconds at Max Level, alongside a six-second Shock. That's a big step up from the starting debuff, but don't expect it to cut a Boss's total damage by 45%.
If you want Tassia to bring your team back from a death, take Blinding Storm to Level 6 first. If you want her to heal and cleanse more, upgrade Watchful Eye first, as Level 6 removes two debuffs and Level 10 heals for 500% of her ATK. If you want her to lower enemy damage, consider Thalassic Terror first, as it reaches 40% ATK Down at Level 10.
Build And Team Support
Build Accuracy first, on her Chestplate and then as much as the build allows, as ATK Down, Shock, Launch, Blind, Combo SPD Down and shortening buff durations all need it to land. Fully Awakened and before Gear she has 23 Accuracy. Healing and the revive don't need Accuracy, so stacking it won't make the heal bigger. After that, build HP, then RES, so she stays alive: a Support who's interrupted or defeated can't recover the team. ATK then powers Watchful Eye's heal. Depending on the fight, RES and the right Tolerances can matter more than another ATK stat. Add Mana Gen for Blinding Storm's Mana cost (1,075 at Level 6, 1,000 at Max Level) and Skill RECOV for Watchful Eye.
For Relic Sets, Accuracy Relics help her debuffs land. Health Relics and Resistance Relics keep her alive and let her shrug off enemy debuffs, and Mana Relics help her reach Blinding Storm and its revive. Her native Manaburn and Crush Tolerances are especially relevant against Hyxxis and Sorgott.
Watchful Eye only heals one ally per cast. If your whole team is losing HP together, pair her with team healing or Shielding. If your team already has plenty of AoE healing, you may value her cleanse, control and revive more than a bigger heal.
Arena, Bosses And Spires
In Arena, her wide Shock and Launch give your team breathing room, and Blind makes enemy Combo Attacks miss. Be wary of enemy Invokers with Immunity or high RES, as they can stop her debuffs from landing. Her revive can bring back a fallen ally after Level 6, as long as she survives long enough to cast her Ultimate.
Against Sorgott, Tassia's Manaburn and Crush Tolerances, cleansing and Blind cover several things the fight asks for. Her AoE attacks also hit his rats, though she's a Support, not a one-cast rat clear. Watchful Eye can't remove Swarm and cleanses one ally at a time, so add wider Immunity or cleansing when your team needs it.
Hyxxis also uses Manaburn and Crush, so her native Tolerances give her a clear reason to join the team there, and her healing and revive help the team recover. Be wary of Bosses that are immune to Control Debuffs, as they won't be affected by her Launch and Shock.
Against Dark Omnissi, Seasick places Combo SPD Down, which switches off her reflection passive. At Level 10 it lasts six seconds on a ten-second cooldown, so you need another source, an extension or faster casting to keep it up. Against Fire and Water Omnissi, cleansing is rewarded, but Watchful Eye only cleanses one ally, so it may not be enough alone. Against Light Omnissi, who punishes healing by destroying MAX HP, a heal-heavy build is less attractive.
In the Water Spire, Tassia fits well because area control eases pressure on waves, the heal recovers a damaged ally and the revive gives a second chance after a death. That makes her useful when your Water roster has gaps, but it doesn't make every floor an automatic clear. If your whole team keeps losing HP at once, a broader healer or Shield source is still an important partner.
Compare roster options in the Invoker tier list and check the Boss guides for each fight's mechanics.
Awaken
Awakening boosts an Invoker's stats significantly. Bonuses from Relics, Accessories, the Trophy Room, Tactics and Titan leader bonuses apply to base stats and Awakening stats alike, so unlocking the Awakening nodes is critical to maximise Tassia's potential.
Unlocking each Titan node at Star 2, 4 and 6 adds a second to Titan Invokation, taking the total from 12 seconds to 15.
Review the Awakening guide for more detail.
