Final Fantasy X HD Remaster (PS4) - Seymour No Sphere Grid/No Death/No Overdrives/No Summons

Seymour is insanely hard to fight doing the No Sphere Grid challenge. His first phase isn't too bad, but once you kill Anima, things get a lot harder. (Dark Matter instantly kills her)

Make sure you're fully buffed with Haste and Shell for Seymour's last phase and go absolutely ham on him as much as you can with big damaging attacks. I stole twice from Seymour just for fun, but it's not required for this boss fight.

The one thing that does annoy me about fighting Seymour is that they force Yuna into your starting line-up. Yuna instantly dies to any of Seymour's attacks if you're doing the No Sphere Grid challenge.