The Kabillion challenge can be found in the Forgotten Village and involves doing as much damage in 10 turns as possible. To unlock this trophy you will need to exceed 300,000,000 dmg in one challenge. This isn't possible without the help of items from the online store. You will need at least 3 BURST+ rings, 3 REPEAT gems, a stockpile of HP boost items and a little bit of RNG luck.
The basic goal is to generate the extra damage needed by using each characters HP based skills (at a high number level), and hoping for a large number of Bursts, multiple burst techniques, and Repeats during your challenge run. The following was my setup for a run that produced 315,000,000+ dmg:
- All characters @ lvl 999
- 3 of 4 characters best weapons, maxed at lvl 999 with a STR%+ in the additional slot.
- Thanatos Bringer (Albert) - Rare drop from tiny island south of Balor's Hideaway.
- Armageddon Annulus (Esther) - Rare drop from tiny island south of Balor's Hideaway
- Abaddon Reaper (Julia) - Rare drop in Perdition
- 3 Burst+ rings, 1 Burst ring
- 3 Repeat Gems
- HP digits were at least 7, 8 or 9 for respective skills that attack based on HP digits
Process:
- During the first turn I transformed all and used Esther (All parameters up) and Bruno (Evil Down) to max damage.
- All remaining turns use each characters HP based multiple attack skills. Hope for bursts, multiple burst techniques or repeats.
- Albert (Neo Scramble)
- Ester (Bright Circle)
- Bruno (Knife Spread)
- Julia ("I dont remember..." (its the name of the skill, lol)
I wasn't able to exceed 300,000,000 until I had this setup. 2 rings + 2 gems weren't enough for me... but you could get lucky with the RNG. Conversely if you are still having trouble you could always grind out the RSP for the 4th ring and gem.