| Zamorakian hunter (Normal mode) [] | 45–55 | 1/153,600 |
| Zamorakian ritual keeper (Level 107 (Normal mode)) [] | 1 | 1/1,200 |
| Zamorakian ritual keeper (Level 107 (Normal mode)) [] | 45–55 | 1/153,600 |
| Zamorakian ritual keeper (Level 115 (Normal mode)) [] | 1 | 1/1,200 |
| Zamorakian ritual keeper (Level 115 (Normal mode)) [] | 45–55 | 1/153,600 |
| Zamorakian sniper [] | 1 | 1/2,867.2 |
| Zamorakian sniper [] | 45–55 | 1/3,303,014.4 |
| Zanaris Market trinket stall [] | 1 | 1/10 |
| Zoja [] | 1 | 1/58,254.22 |
| Zoja [] | 45–55 | 1/67,108,864 |
| Zombie (Lair of Tarn Razorlor) (Levels 72–75) [] | 1 | 1/14,563.56 |
| Zombie (Lair of Tarn Razorlor) (Levels 72–75) [] | 45–55 | 1/16,777,216 |
| Zombie (Lair of Tarn Razorlor) (Levels 77–79) [] | 1 | 1/14,563.56 |
| Zombie (Lair of Tarn Razorlor) (Levels 77–79) [] | 45–55 | 1/16,777,216 |
| Zombie (Lair of Tarn Razorlor) (Levels 82–85) [] | 1 | 1/14,563.56 |
| Zombie (Lair of Tarn Razorlor) (Levels 82–85) [] | 45–55 | 1/16,777,216 |
| Zombie (Stronghold of Security) [] | 1 | 1/5,688.89 |
| Zombie (Stronghold of Security) [] | 45–55 | 1/6,553,600 |
| Zombie (Normal mode) [] | 1 | 1/1,200 |
| Zombie (Normal mode) [] | 45–55 | 1/153,600 |
| Zombie (Wilderness) (Level 29) [] | 1 | 1/14,563.56 |
| Zombie (Wilderness) (Level 29) [] | 45–55 | 1/16,777,216 |
| Zombie pirate [] | 1 | 1/14,563.56 |
| Zombie pirate [] | 45–55 | 1/16,777,216 |
| Zombie pirate (Harmony Island) [] | 1 | 1/14,563.56 |
| Zombie pirate (Harmony Island) [] | 45–55 | 1/16,777,216 |
| Zombie swab [] | 1 | 1/14,563.56 |
| Zombie swab [] | 45–55 | 1/16,777,216 |
| Zombie (Level 29) [] | 1 | 1/14,563.56 |
| Zombie (Level 29) [] | 45–55 | 1/16,777,216 |