| Kal'gerion demon [] | 1 | 1/1,066.67 |
| Kal'gerion demon (The Shadow Reef) (Normal mode) [] | 1 | 1/1,600 |
| Kalphite Guardian [] | 1 | 1/2,995.93, 2 rolls |
| Kalphite Guardian [] | 1 | 1/2,666.67 |
| Kalphite King [] | 1 | 1/533.33, 3 rolls |
| Kalphite Queen [] | 1 | 1/1,361.79, 4 rolls |
| Kalphite Soldier [] | 1 | 1/3,744.91 |
| Kalphite Worker [] | 1 | 1/7,489.83 |
| Killerwatt [] | 1 | 1/7,489.83 |
| King Black Dragon (Members) [] | 1 | 1/944.65 |
| Knight of Ardougne [] | 1 | 1/2,995.93 |
| Kraka [] | 1 | 1/2,995.93 |
| Kree'arra (Hard mode) [] | 1 | 1/1,066.67 |
| Kree'arra (Normal) [] | 1 | 1/933.69 |
| Ksenia [] | 1 | 1/59,918.63 |
| Laboratory slime (Big (Normal mode)) [] | 1 | 1/1,600 |
| Lady Himiko (Normal mode) [] | 1 | 1/1,600 |
| Lampenflora [] | 1 | 1/1,066.67 |
| Lanzig [] | 1 | 1/59,918.63 |
| Lava spider (Normal mode) [] | 1 | 1/1,600 |
| Lava strykewyrm [] | 1 | 1/1,066.67 |
| Lava strykewyrm (Dragonkin Laboratory) (Normal mode) [] | 1 | 1/1,600 |
| Lensa [] | 1 | 1/59,918.63 |
| Lesser demon [] | 1 | 1/1,248.3 |
| Lesser demon [] | 1 | 1/1,248.3 |
| Lesser demon [] | 1 | 1/1,248.3 |
| Lesser reborn mage [] | 1 | 1/1,671.84 |
| Lesser reborn ranger [] | 1 | 1/1,671.84 |
| Lesser reborn warrior [] | 1 | 1/1,671.84 |
| Lev [] | 1 | 1/59,918.63 |
| Liliya [] | 1 | 1/59,918.63 |
| Liverworts [] | 1 | 1/1,066.67 |
| Lizard [] | 1 | 1/2,995.93 |
| Locust lancer [] | 1 | 1/1,069.98, 2 rolls |
| Locust ranger [] | 1 | 1/1,069.98, 2 rolls |
| Locust rider [] | 1 | 1/1,069.98 |
| Luminous snaggler [] | 1 | 1/1,066.67 |
| Magma golem (Normal mode) [] | 1 | 1/1,600 |
 Magpie impling[] | 1 | 1/20 |
| Magpie impling jar [] | 1 | 1/20 |
| Mahogany casket [] | 1 | 5/128 |
| Managing Miscellania (Fishing) [] | — | Uncommon |
| Managing Miscellania (Fishing (cooked)) [] | — | Unknown |
| Manifest shadow [] | 1 | 1/4,022.86 |
| Market Guard [] | 1 | 1/14,979.66 |
| Masuta the Ascended (Normal mode) [] | 1 | 1/1,600 |
| Masuta the Descended (Normal mode) [] | 1 | 1/1,600 |
| Mature grotworm [] | 1 | 1/2,666.67 |