Petalmagic

If my character were a boss: Mechanics and what not
Level:250
HP: A lot (3 phases)
Stats: A lot

Mechanics

Phase 1:
In Phase 1, Lumina does not even use her scythe, she will fly around the map, which has two higher platforms and a middle platform alongside the general floor.
Attacks
-Impaling Wing: Standard Rush attack, will apply a short stun if you are hit though.
-Tainted Touch: Linear AoE that will apply Taint to you. Taint is a special status effect that causes potions to be useless, best have a bishop handy for this mechanic as its one of the only ways to heal Taint via Dispel.
-Drawn In: a pull mechanic, anyone with Taint will be pulled in faster, if you hit the center, you will lose like...all of your HP.
Taint Explosion: Think Damien's Phase 1 Ball throwing mechanic, except this applies Taint.
Phase 1.5 - Transition Phase after 70% HP
Lumina will stop attacking your party for now. Some Tainted Villagers will spawn. Your goal is to keep them alive through the phase. There are three main villagers and a bunch of non-essentials. The Main villagers are the Old Lady, the Child, and the Soldier. These villagers will move around the map slowly, but Lumina will target them with Scythe Spin (Soon to be your worst enemy in Phase 2) along with meteors similar to Lotus/Magnus. You have to meat shield the villagers via the higher platforms for meteors, while Scythe spin...Ill leave that to you to figure out. If you save all of the 3 Main villagers, you will earn a buff.

Phase 2:
Here comes the Scythe, Lumina will still fly around, but will use a lot of Scythe based attacks, along with the beginning of her Minion summoning.
Attacks
-Round Scythe: General AoE around the boss. Does moderate damage but she does give an indicated animation before it starts.
-Reckoning: Lumina flies up to one of the two side platforms and performs an almost map-wide AoE. Best find out where those safe spots are!
-Scythe Spin: Lumina throws her scythe. It will target one party member at a time, but it does have a set number of "bounces" before it will return to her (I would say 10). The goal here is...bait the scythe so it doesn't hit your party members. If the Scythe hits you, you will become "Marked". If it hits more than 4 players and marks them, they all die. The Scythe will aim for all 6 members within its 10 bounces though, and will only kill marked players if more than 4 players have it, and since it only hits one target...well, keep an eye out!
-Rise of the Taint: Brings out Tainted Enemies. There are three types:
Tainted Fox: A fast monster, fairly weak damage and medium HP, but it can debuff you with Undead and Taint.
Tainted Bat: Flying Monster, deals 10% HP per hit, but also has lower HP and is pretty predictable.
Tainted Bear: Big Monster, performs a 1-shotting AoE, but it requires a charge-up period. This is a case of Kill or be killed. High HP but won't attack while charging.

Phase 3:
After you depleted her first HP bar, you thought it was over, right? Well, Lumina won't die so easily. She is now dripping with the Taint, and her Scythe has changed somewhat. Expect some of the Phase 2 Mechanics to carry over (Rise of the Taint, Round Scythe, and Scythe Spin)
Attacks
-Scythe Charge: A spinning charge attack using the Changed Scythe. Puts Taint on anyone who gets hit.
-Bloodletting: Leaves a puddle AoE. I would not recommend standing in it for too long, or you may be debuffed with Tainted. Tainted is different from Taint, as you cannot do skill actions and there is NO healing out of it, just gotta wait it out.
-Bleeding Inferno: Summons falling objects that will inflict stuns onto you. Leaves Lumina vulnerable while she is casting this attack though. Lasts about 10-15 seconds.
-Final Scythe: after about 40% of her health is left, she will begin casting this. Her Scythe becomes giant and turns into a large Staff. Has a large AoE and will drain your HP slowly, while trying to heal hers. You will have to break the Scythe Staff before she heals up!
-Blackened: 25% or lower, Blackened will darken the map for a period of time. Good luck not getting hit!