# Obols
Obols are special stat-boosting items earned from [[Mechanics/Tower|The Tower]]. They provide flat bonuses to your core stats.
## Tiers
Obols come in seven tiers, each providing more stat points:
| Tier | Stat Bonus |
|------|-----------|
| Iron | 1 |
| Gold | 2 |
| Emerald | 4 |
| Ruby | 6 |
| Opal | 8 |
| Topaz | 11 |
| Bismuth | 14 |
## Upgrading Obols
Lower-tier obols can be upgraded to the next tier by combining obols.