| Scarab mage [] | 1 | 1/1,040.25 |
| Scarab mage [] | 45–55 | 1/1,198,372.57 |
| Scutarius [] | 1 | 1/1,200 |
| Scutarius [] | 45–55 | 1/153,600 |
| Sea crocodile (Normal mode) [] | 1 | 1/1,200 |
| Sea crocodile (Normal mode) [] | 45–55 | 1/153,600 |
| Sea horror (Normal mode) [] | 1 | 1/1,200 |
| Sea horror (Normal mode) [] | 45–55 | 1/153,600 |
| Sea Snake Hatchling [] | 1 | 1/14,563.56 |
| Sea Snake Hatchling [] | 45–55 | 1/16,777,216 |
| Sea Snake Young [] | 1 | 1/14,563.56 |
| Sea Snake Young [] | 45–55 | 1/16,777,216 |
| Seasinger priestess [] | 1 | 1/7,281.78 |
| Seasinger priestess [] | 45–55 | 1/8,388,608 |
| Seeker [] | 1 | Very rare |
| Seeker [] | 45–55 | Very rare |
| Seiryu the Azure Serpent (Normal mode) [] | 1 | 1/1,200 |
| Seiryu the Azure Serpent (Normal mode) [] | 45–55 | 1/153,600 |
| Seren archer [] | 1 | 1/2,867.2 |
| Seren archer [] | 45–55 | 1/3,303,014.4 |
| Seren mage [] | 1 | 1/2,867.2 |
| Seren mage [] | 45–55 | 1/3,303,014.4 |
| Seren spirit [] | 1 | 1/8 |
| Seren spirit [] | 45–55 | 1/1,024 |
| Seren warrior [] | 1 | 1/2,867.2 |
| Seren warrior [] | 45–55 | 1/3,303,014.4 |
| Shadow demon [] | 1 | 1/2,753.42 |
| Shadow demon [] | 45–55 | 1/3,171,942.4 |
| Shadow nihil [] | 2 | 12/228 |
| Shadow nihil [] | 1 | 1/800 |
| Shadow nihil [] | 45–55 | 1/102,400 |
| Shadow warrior [] | 1 | 1/1,820.44 |
| Shadow warrior [] | 45–55 | 1/2,097,152 |
| Shrine Maiden Elei (Normal mode) [] | 1 | 1/1,200 |
| Shrine Maiden Elei (Normal mode) [] | 45–55 | 1/153,600 |
| Shul the Molten (Normal mode) [] | 1 | 1/1,200 |
| Shul the Molten (Normal mode) [] | 45–55 | 1/153,600 |
| Siege engine [] | 1 | 8/128 |
| Silverquill, the Dreadhog [] | 2–3 | Uncommon |
| Sir Carl [] | 1 | 1/7,281.78 |
| Sir Carl [] | 45–55 | 1/8,388,608 |
| Sir Harry [] | 1 | 1/7,281.78 |
| Sir Harry [] | 45–55 | 1/8,388,608 |
| Sir Jerro [] | 1 | 1/7,281.78 |
| Sir Jerro [] | 45–55 | 1/8,388,608 |
| Skeletal miner [] | 1 | 1/7,281.78 |
| Skeletal miner [] | 45–55 | 1/8,388,608 |
| Skeleton (Dark Warriors' Fortress) [] | 1 | 1/7,281.78 |