OPERATION
From this information, we can conclude that VOID RELICS operate by using the standard random number generation formula any other rewards table would use, except with higher tiers than INTACT using different base values as a source for calculation:
BASE COMMON DROP CHANCE / NUMBER OF ITEMS (ASSIGNED COMMON RARITY) = COMMON ITEM DROP CHANCE (PER ITEM)
BASE UNCOMMON DROP CHANCE / NUMBER OF ITEMS (ASSIGNED UNCOMMON RARITY) = UNCOMMON ITEM DROP CHANCE (PER ITEM)
BASE RARE DROP CHANCE / NUMBER OF ITEMS (ASSIGNED RARE RARITY) = RARE ITEM DROP CHANCE (PER ITEM)