 Chaos druid warrior | 1 | 1/1,024 |
 Chaos dwarf | 1 | 1/204.8 |
 Chaos Elemental | 1 | 1/819.2 |
 Chaos Fanatic | 6 | 5/128 |
| Chaos Fanatic | 1 | 1/221.41 |
 Chaos Golem (Golem) | 1 | 4/52 |
 Chasm Crawler (Standard) | 1 | 1/1,024, 3 rolls |
| Chest (Aldarin Villas) | 1 | 3/75 |
| Chest (Anglers' Retreat) | 8 | Always |
| Chest (Dorgesh-Kaan Rich) | 1 | 1/15 |
| Chest (Isle of Souls Dungeon) | 1–2 | 8/200 |
| Chest (Rogues' Castle) (Hard Wilderness Diary) | 12 | 2/66 |
| Chest (Rogues' Castle) (Medium Wilderness Diary) | 10 | 2/66 |
 Chilled jelly | 1 | 1/256 |
 Choke devil | 1 | 1/128, 3 rolls |
| Clay rocks | 1 | 16/32,768 |
| Coal rocks | 1 | 16/32,768 |
 Cockathrice | 1 | 1/512, 3 rolls |
 Cockatrice | 1 | 1/512 |
 Colossal Hydra | 1 | 1/1,024, 3 rolls |
 Commander Zilyana | 1 | 1/312.62 |
| Copper rocks | 1 | 16/32,768 |
 Corporeal Beast | 1 | 1/341.33, 10 rolls |
| Crashed Star | 1 | 16/32,768 |
 Crawling Hand (Level 7) | 1 | 1/512 |
 Crazy archaeologist | 6 | 5/128 |
| Crazy archaeologist | 1 | 1/221.41 |
 Crushing hand | 1 | 1/512, 3 rolls |
 Cyclops | 1 | 1/341.33 |
 Cyclops (Level 56) | 1 | 1/400 |
 Cyclops (Green) | 1 | 1/400 |
| Cyclops (Warriors' Guild Basement) | 1 | 1/2,560 |
| Cyclops (Warriors' Guild Rooftop) | 1 | 1/400 |
| Daeyalt Essence (rock) | 1 | 16/32,768 |
 Dagannoth (Level 74 (1)) | 1 | 1/1,024 |
 Dagannoth (Level 88) | 1 | 1/1,024 |
 Dagannoth Prime | 1 | 1/91.02 |
 Dagannoth Rex | 1 | 1/91.02 |
 Dagannoth spawn | 1 | 1/1,024 |
 Dagannoth Supreme | 1 | 1/91.02 |
 Dark beast | 1 | 1/295.21 |
 Demonic gorilla (1) | 1 | 1/5,120 |
 Deranged archaeologist | 1 | 1/151.06 |
 Desert Lizard (Green) | 1 | 1/170.67 |
 Deviant spectre | 1 | 1/32 |
 Dire gryphon | 1 | 1/1,024, 3 rolls |
 Donny the lad | 1 | 1/512 |
 Drake | 1 | 1/744 |