 Cave abomination | 1 | 1/39.4, 3 rolls |
 Cave bug (Level 6) | 1 | 16/128 |
| Cave bug (Level 6) | 1 | 1/22.3 |
 Cave bug (Level 96) | 1 | 1/26.9 |
| Cave crawler | 1 | 1/23.3 |
 Cave horror (Worker) | 1 | 1/39.4 |
 Cave kraken (Cave kraken) | 1 | 1/133.3 |
 Ceolburg | 1 | 1/22.3 |
 Chaos druid | 1–2 | 1/11.1 |
 Chaos druid warrior | 1–2 | 1/11.6 |
 Chasm Crawler (Standard) | 1 | 1/23.3, 3 rolls |
| Chest (Bryophyta's lair) (Members) | 1 | 1/94.4 |
| Chest (Isle of Souls Dungeon) | 1–2 | 20/200 |
 Choke devil | 1 | 1/64, 3 rolls |
 Cockathrice | 1 | 1/51.2, 3 rolls |
 Cockatrice | 1 | 1/51.2 |
 Colossal Hydra | 1–3 | 1/128, 3 rolls |
 Crocodile (Water) | 1 | 1/80 |
 Cuffs | 1 | 1/22.3 |
 Cyclops | 1 | 1/73.1 |
 Cyclops (Level 56) | 1 | 1/133.3 |
 Cyclops (Green) | 1 | 1/133.3 |
| Cyclops (Warriors' Guild Basement) | 1 | 1/100 |
| Cyclops (Warriors' Guild Rooftop) | 1 | 1/133.3 |
 Dagannoth (Level 88) | 1 | 1/64 |
 Dagannoth (Level 90) | 1 | 1/128 |
 Dark beast | 1 | 1/26.9 |
| Dark beast | 1 | 1/102.4, 2 rolls |
| Dark warrior (Great Kourend) | 1 | 1/170.7 |
 Dark warrior (Level 145) | 1 | 1/170.7 |
| Dark warrior (Level 8) | 1 | 1/170.7 |
 Desert Lizard (Green) | 1 | 1/51.2 |
 Deviant spectre | 1–3 | 1/11.1 |
 Dire gryphon | 1 | 1/46.5, 3 rolls |
 Donny the lad | 1 | 1/34.1 |
 Drake | 1 | 1/37.2 |
 Dreadborn Araxyte | 2 | 1/50.8, 3 rolls |
 Druid | 1 | 1/19.7 |
 Drunken man | 1 | 1/22.3 |
| Dust devil (Regular) | 1 | 1/26.9 |
 Dust devil (Wilderness Slayer Cave) | 1 | 1/26.5 |
 Eagle ray | 1–2 | 1/17.1 |
| Earth elemental (Regular) | 1 | 1/36.6 |
 Earth warrior | 1 | 1/36.6 |
 Eduard | 1 | 1/1,024 |
 Elder Chaos druid | 1–4 | 1/9.4 |
 Elf Archer (1) | 1 | 1/34.1 |
 Elf Warrior (1) | 1 | 1/34.1 |