You may have noticed the shop gives out a “Buy-out reward”. You earn this if you see “Sold Out” on at least 4 of the offerings within the shop.
As your castle upgrades, the buy-out reward gets better too. Here’s what you can expect if you buy out the shop at each castle level.
| Castle Level | Buyout Reward |
| 1 | Spell Cannon Level 1 |
| 2 | Spell Cannon Level 1 |
| 3 | Spell Cannon Level 1 |
| 4 | Bell Tower Level 1 |
| 5 | Crystal Tower Level 1 |
| 6 | Spell Cannon Level 1 |
| 7 | Spinshot Tower Level 1 |
| 8 | Bell Tower Level 1 |
| 9 | Skyshot Tower Level 0 |
| 10 | Crystal Tower Level 3 |
| 11 | Spinshot Tower Level 4 |
| 12 | Spell Cannon Level 5 |
| 13 | Bell Tower Level 6 |
| 14 | Crystal Tower Level 7 |
| 15 | Skyshot Tower Level 6 |
| 16 | Spinshot Tower Level 9 |
| 17 | Spell Cannon Level 10 |
| 18 | Bell Tower Level 10 |
| 19 | Crystal Tower Level 1 |
| 20 | Skyshot Tower Level 8 |