<aside> 💡 This entire section was extracted from Lyra’s spreadsheet and completed or annotated by Kitty ✨ when deemed relevant for better readability, particularly on mobile. All props to Lyra for the content. Updated for version 0.935.
</aside>
damage =
(Magic Base Damage * attack) * (amplification)
* (magic damage increase * magic damage decrease)
* (critical strike multiplier)
* additional damage^
Every magic has a base damage number, For Magic Bolt for instance, it is 4.0 base damage in-game.
Attack is the general damage stat, the first part of the damage formula.
The base character attack is 100. Every % of increased attack is based off this 100 base attack. The Ruby artifact grants 12% of 100 base attack, or 12, for a new attack value of 112. Picking another 20% increased attack from another source, it is still based off the 100 starting attack, so you will gain another 20 for a total 132 attack.
Sources:
Amplification is the second component of the damage formula and overall quite simple. It is just every individual source added together. If you have DNA (1% amplification for every 5,000 enemies killed) and you have Necronomicon (50% amplification) then you will have 50% + however many enemies you killed for DNA — say 50,000 enemies so 10% from DNA, now you have 60% (50% + 10%) total.
Sources: