Sucreso

Scaling and Luminas

Level 2

Rank D on turn start.

Level 3

Ranks reduce damage taken by 20% per Rank, instead of increasing damage dealt.

Level 4

25% increased damage on Rank up. Resets on taking damage.

How a grade turns into damage isn't confirmed yet; the grades and unlock steps are from the game's weapon table.

Where to get it 1

Areas come from where each chest and encounter is placed in the game's levels. Merchants' areas come from their names in the game's merchant table; a few rewards are handed out by scripted events and show as not placed.