Hammerstone seed: where to get it
| Source | Quantity | Chance per roll |
|---|---|---|
 Black Knight Titan | 3 | 1/154 |
 Cockathrice | 3 | 1/114, 3 rolls |
 Cyclops | 3 | 1/232 |
| Flowering Tree (Forestry event) | 1–6 | Uncommon |
 Giant rockslug | 3 | 1/220, 3 rolls |
 Grimy Lizard | 3 | 1/567 |
 Head Guard | 3 | 1/107 |
 Mammoth (Normal) | 4 | 20/640 |
 Martin the Master Gardener | 1–9 | 1/18 |
 Master Farmer (1) | 1–9 | 1/18 |
 Moonlight Cockatrice | 3 | 1/3,056 |
| Obor (Members) | 3 | 1/143 |
| Seed pack (Low seed) | 6–8 | 2/60 |
| Seed Stall | 1 | 120/1,000 |
 Sergeant | 3 | 1/107 |
 Skeleton (1) | 3 | 1/2,858 |
 Skeleton (Melee) | 3 | 1/2,858 |
 Sulphur Lizard | 3 | 1/2,079 |
 Tortoise (No riders) | 3 | 1/182 |
 Tortoise (With riders) | 3 | 1/212 |
 Vyrewatch (Level 87) | 3 | 1/1,819 |
| Wise Old Man tasks | 1–9 | Uncommon |
 Zombie (Melee) | 3 | 1/2,858 |