Soul Smite - A one hit BB that does massive damage to the whole party.
Soul Desecretion - An AoE BB that does a huge amount of damage (around 4000+) to the whole party (may be used more than once on the same turn). Usually used every 3 turns.
Ardent Soul Slash - A single target BB that can cause Weakness or Paralysis
Mono-Teams with Seals and Ores are highly recommended to withstand back to back AoE.
Note: Sir Sancus Xenon Lv9 will most likely unleash his 3 AoE BB the next turn after the turn he previously used his Soul Smite BB. Guarding is advised.
His 3 AoE BB might be used any time after his HP is reduced to below 50% , Recommended to use Seals right after his hp is reduced to below 50%.