Crafting
Deterministic craft reference: pick a base and an item level to see exactly which prefix and suffix tiers can roll. Straight from the game's mod data.
The game data does not carry modifier weights, so this page does not print chances. It lists what can roll and from which item level, with tiers counted the game's way: T1 is the best.
Desecration
Desecrated modifiers, grouped by the Abyssal lich whose mark they carry. Abyssal bones offer picks from these pools.
Which of these can actually appear depends on the base's defence types.
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Amanamu(6)
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Kurgal(6)
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Ulaman(5)
▶Abyssal bones(12)
What each bone desecrates, in the game's own words.
Essences
What each essence guarantees on each kind of equipment, in the game's own lines.
▶Essences(34)
Corruption
Corrupting an item with a Vaal Orb is unpredictable: it can change nothing but the corrupted mark, and it can add one corrupted implicit from the pools below. A corrupted item cannot be crafted on any further.
▶Helmets(14)
Which of these can actually appear depends on the base's defence types.