Gaea Is a Solo Boss In MOW MY LAWN: TWEAKED
She can be fought at the Red Portal, She is probably the most annoying Archgoddess to fight, depends on the player.
"Defeat the imperialist Gaea, and topple her delusions of an empire.
Awoken from eternal slumber within another dimension by the archdemon Sylvar, Gaea foolishly betrayed her savior and attempted to recreate the reign of the gods on Earth.
It did not exactly work out." - Gaea's Badge Description, Glory or Death
Gaea is one of the 4 Archgoddesses needed to defeat to get to The Final Tier 1 boss, She has 500k (500000) HP and 2 Phases, as for any solo normal Bosses, you have 1 Life.
Defeating Her will give you the HellFire Candle
For Her appearence, she wears only Black and Red clothing and has red hair, she also has Red Eyes(?).
Once you spawn in her arena, go to one of the 2 Chess Pawns, if you choose Ace (Left Pawn), then you should be careful with the sphere he spawns, which can stunlock you for a brief second, which can be quite deadly, you dont have to worry too much if you got to Jester (Right Pawn), because he cant stunlock you, and you can just heal yourself with the Archspear, your only real worry is to dodge her giant lasers, which can simply kill you if you arent careful.
Once you destroy the 2 Pawns, you will get to the 2nd Phase, Gaea will have more and chaotic attacks, you should watch out for her moves, since one mistake and you will either have little life left or straight up die, you can also get close to her to dodge the giant spike attack, though that can be dangerous since you can have a bigger chance of getting damaged by her triple slash attack.