| Catablepon [] | 1 | 1/6,619,136 |
| Cave bug [] | 1 | 1/3,355,443.2 |
| Cave crawler [] | 1 | 1/16,777,216 |
| Cave crawler [] | 1 | 1/5,592,405.33 |
| Cave horror [] | 1 | 1/204,800, 3 rolls |
| Cave slime [] | 1 | 1/4,194,304 |
| Celebration Lamps [] | 1 | 1,291,125/89,196,800 |
| Celestial dragon (Dragonkin Laboratory) (Normal mode) [] | 1 | 1/153,600 |
| Cerberus Frost [] | 1 | 5,520,000/593,400,000 |
| Champion of Infernus [] | 1 | 1/3,250,585.6 |
| Chaos druid [] | 1 | 1/16,777,216 |
| Chaos druid warrior [] | 1 | 1/16,777,216 |
| Chaos dwarf [] | 1 | 1/3,355,443.2 |
| Chaos dwarf (Chaos Dwarf Battlefield) [] | 1 | 1/3,355,443.2 |
| Chaos dwarf [] | 1 | 1/3,303,014.4 |
| Chaos dwarf hand cannoneer [] | 1 | 1/3,460,300.8 |
| Chaos dwogre [] | 1 | 1/3,879,731.2 |
| Chaos Elemental (Members) [] | 1 | 1/101,165.07, 2 rolls |
| Chaos Giant [] | 1 | 1/204,800 |
| Chaos witch apprentice (Normal mode) [] | 1 | 1/153,600 |
| Chaos witch channeler (Level 143 (Normal mode)) [] | 1 | 1/153,600 |
| Chaos witch lifeweaver (Normal mode) [] | 1 | 1/153,600 |
| Chaos witch magus (Normal mode) [] | 1 | 1/153,600 |
| Chaos witch mender (Normal mode) [] | 1 | 1/153,600 |
| Chaos witch (Normal mode) [] | 1 | 1/153,600 |
| Christmas Trail [] | 1 | Unknown |
| Cloaked zealot (Normal mode) [] | 1 | 1/153,600 |
| Cloaked zealot (Normal mode) [] | 1 | 1/153,600 |
| Cockatrice [] | 1 | 1/8,388,608 |
| Cockroach drone [] | 1 | 1/2,796,202.67 |
| Cockroach soldier [] | 1 | 1/2,396,745.14 |
| Cockroach worker [] | 1 | 1/3,355,443.2 |
| Commander Zilyana (Hard mode) [] | 1 | 1/102,400 |
| Commander Zilyana (Normal mode) [] | 1 | 1/101,165.07 |
| Contagion [] | 1 | 865,425/99,579,865 |
| Cooper (Normal mode) [] | 1 | 1/153,600 |
| Corporeal Beast [] | 1 | 1/6,710,886.4, 10 rolls |
| Corrupted dust devil [] | 1 | 1/153,600 |
| Corrupted energy (medium) [] | 5 | Always |
| Corrupted kalphite guardian [] | 1 | 1/153,600 |
| Corrupted kalphite marauder [] | 1 | 1/153,600 |
| Corrupted lizard [] | 1 | 1/153,600 |
| Corrupted scarab [] | 1 | 1/153,600 |
| Corrupted scorpion [] | 1 | 1/153,600 |
| Corrupted worker [] | 1 | 1/153,600 |
| Cosmetic chest [] | 1 | Common |
| Crassian Leviathan (Normal mode) [] | 1 | 1/153,600 |
| Crassian scout (Normal mode) [] | 1 | 1/153,600 |