 Cave slime | 1 | 1/512 |
 Cerberus | 1 | 1/4,437.33 |
| Certer | 1 | 8/150 |
 Chaos druid | 1 | 1/2,048 |
 Chaos druid warrior | 1 | 1/2,048 |
 Chaos dwarf | 1 | 1/409.6 |
 Chaos Elemental | 1 | 1/1,638.4 |
 Chaos Fanatic | 1 | 1/442.81 |
 Chaos Golem (Golem) | 1 | 2/52 |
 Chasm Crawler (Standard) | 1 | 1/2,048, 3 rolls |
| Chest (Aldarin Villas) | 1 | 2/75 |
| Chest (Bryophyta's lair) (Free-to-play) | 5 | 4/118 |
| Chest (Bryophyta's lair) (Members) | 5 | 4/118 |
| Chest (Dorgesh-Kaan Rich) | 1 | 1/15 |
| Chest (Isle of Souls Dungeon) | 1–2 | 6/200 |
| Chest (Laguna Aurorae) | 8 | Always |
| Chest (Obor's lair) | 5 | 5/118 |
 Chilled jelly | 1 | 1/512 |
 Choke devil | 1 | 1/256, 3 rolls |
| Clay rocks | 1 | 8/32,768 |
| Coal rocks | 1 | 8/32,768 |
 Cockathrice | 1 | 1/1,024, 3 rolls |
 Cockatrice | 1 | 1/1,024 |
 Colossal Hydra | 1 | 1/2,048, 3 rolls |
 Commander Zilyana | 1 | 1/625.23 |
| Copper rocks | 1 | 8/32,768 |
 Corporeal Beast | 1 | 1/682.67, 10 rolls |
| Crashed Star | 1 | 8/32,768 |
 Crawling Hand (Level 7) | 1 | 1/1,024 |
 Crazy archaeologist | 1 | 1/442.81 |
 Crushing hand | 1 | 1/1,024, 3 rolls |
 Cyclops | 1 | 1/682.67 |
 Cyclops (Level 56) | 1 | 1/800 |
 Cyclops (Green) | 1 | 1/800 |
| Cyclops (Warriors' Guild Basement) | 1 | 1/5,120 |
| Cyclops (Warriors' Guild Rooftop) | 1 | 1/800 |
| Daeyalt Essence (rock) | 1 | 8/32,768 |
 Dagannoth (Level 74 (1)) | 1 | 1/2,048 |
 Dagannoth (Level 88) | 1 | 1/2,048 |
 Dagannoth Prime | 1 | 1/182.04 |
 Dagannoth Rex | 1 | 1/182.04 |
 Dagannoth spawn | 1 | 1/2,048 |
 Dagannoth Supreme | 1 | 1/182.04 |
 Dark beast | 1 | 1/590.41 |
 Demonic gorilla (1) | 1 | 1/10,240 |
 Deranged archaeologist | 1 | 1/302.13 |
 Desert Lizard (Green) | 1 | 1/341.33 |
 Deviant spectre | 1 | 1/64 |