Some equipment, abilities, circumstances, and special rules grant Bonus Dice. Bonus Dice range from d4 to d12 and are rolled alongside the associated d100 test. Every Bonus Die is either Hot or Cold.
Each Bonus Die generates Bonus Hits according to its result:
| Die Result | Bonus Hits |
|---|---|
| 1–2 | 0 |
| 3–4 | 1 |
| 5–6 | 2 |
| 7–8 | 3 |
| 9–10 | 4 |
| 11–12 | 5 |
Hot Bonus Dice
Hot Bonus Dice count their Bonus Hits only if their associated d100 test succeeds. A Hot Bonus Die cannot turn a failed d100 test into a success.
Unless a rule identifies a Bonus Die as Cold, it is Hot.
Cold Bonus Dice
Cold Bonus Dice count their Bonus Hits regardless of whether their associated d100 test succeeds or fails. A Cold Bonus Die also cannot turn a failed d100 test into a success; it only supplies Hits for the purpose stated by its rule.
Some Cold Bonus Dice are rolled without an associated d100 test. Their Bonus Hits count normally.
Bonus Dice from separate sources stack unless a rule states otherwise or the sources cannot reasonably apply to the same action.