| 'Rum'-pumped crab [] | 68–82 | 1/2,048,000 |
| Aberrant spectre [] | 68–82 | 1/2,621,440 |
| Abomination [] | 68–82 | 1/128,000 |
| Abyssal beast [] | 68–82 | 1/96,000 |
| Abyssal demon [] | 68–82 | 1/192,000 |
| Abyssal demon [] | 68–82 | 1/128,000, 3 rolls |
| Abyssal demon [] | 68–82 | 1/4,128,768 |
| Abyssal guardian [] | 1 | 5/256 |
| Abyssal leech [] | 1 | 5/256 |
| Abyssal lord [] | 68–82 | 1/64,000 |
| Abyssal savage [] | 68–82 | 1/128,000 |
| Abyssal walker [] | 1 | 5/256 |
| Acheron mammoth [] | 3–5 | 6/128 |
| Acheron mammoth [] | 68–82 | 1/128,000 |
| Adamant dragon [] | 68–82 | 1/76,800 |
| Ahoeitu the Chef (Normal mode) [] | 68–82 | 1/192,000 |
| Air elemental [] | 68–82 | 1/10,485,760 |
| Airut [] | 68–82 | 1/183,402.99 |
| Alanogard the Black (Normal mode) [] | 68–82 | 1/192,000 |
| Alexis [] | 68–82 | 1/83,886,080 |
| Anagami [] | 1–3 | 7/128 |
| Anagami (Normal mode) [] | 68–82 | 1/192,000 |
| Ancient mage [] | 68–82 | 1/10,485,760 |
| Ancient mage [] | 68–82 | 1/4,128,768 |
| Ancient ranger [] | 68–82 | 1/6,990,506.67 |
| Ancient ranger [] | 68–82 | 1/4,128,768 |
| Ancient warrior [] | 68–82 | 1/6,990,506.67 |
| Ancient warrior [] | 68–82 | 1/4,128,768 |
| Angry barbarian spirit [] | 68–82 | 1/10,076,160 |
| Animated book (Dragonkin Laboratory) (Normal mode) [] | 68–82 | 1/192,000 |
| Ankou [] | 68–82 | 1/3,495,253.33 |
| Ankou [] | 68–82 | 1/1,529,173.33, 3 rolls |
| Aquanite [] | 68–82 | 1/320,000 |
| Aquanite [] | 68–82 | 1/128,000, 3 rolls |
| Araxxi [] | 40–70 | 1/17 |
| Arch-Glacor (Hard mode) [] | 70 | Common |
| Arch-Glacor (Normal mode (2 mechs.)) [] | 4–7 | 20/200, 3 rolls |
| Arch-Glacor (Normal mode (3 mechs.)) [] | 6–11 | 20/200, 3 rolls |
| Arch-Glacor (Normal mode (4 mechs.)) [] | 9–15 | 20/200, 3 rolls |
| Arch-Glacor (Normal mode (5 mechs.)) [] | 15–26 | 20/200, 3 rolls |
| Arhat [] | 1–3 | 7/128 |
| Arhat (Normal mode) [] | 68–82 | 1/192,000 |
| Arhat paragon (Normal mode) [] | 68–82 | 1/192,000 |
| Armadylean shaman [] | 68–82 | 1/1,497,965.71 |
| Armadylean shaman [] | 1 | 5/128 |
 Armoured zombie (Defender of Varrock)[] | 68–82 | 1/20,971,520 |
| Armoured zombie (Normal mode) [] | 68–82 | 1/192,000 |
 Arrg (Scratched)[] | 68–82 | 1/4,194,304 |