Blueprints
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If a blueprint has a valid spawn location on a floor (some boss arenas cannot spawn them), there is a 25% chance that a blueprint will be selected to spawn.
After finding a blueprint, a cooldown of 2 floors is applied where blueprints cannot spawn, before returning to a 25% chance. This means that if you find a blueprint on Forest 1, the next floor that can spawn a blueprint is Dark Caves 1. Returning to town and starting a new run always reduces the cooldown enough to allow a blueprint to spawn on Forest 1.
Blueprints cannot spawn inside of secrets or traps.
Spawning Odds
This table shows the chance of finding a blueprint within a certain number of floors.
| Floors | Odds for Blueprint |
|---|---|
| 1 | 25.00% |
| 2 | 43.75% |
| 3 | 57.81% |
| 4 | 68.36% |
| 5 | 76.27% |
| 6 | 82.20% |
| 7 | 86.65% |
| 8 | 89.99% |
| 9 | 92.49% |
| 10 | 94.37% |
| 11 | 95.78% |
| 12 | 96.83% |
| 13 | 97.62% |
| 14 | 98.22% |
| 15 | 98.66% |
| 16 | 99.00% |
| 17 | 99.25% |