In one line: tomes go from level 0 to 18. Level 12 gets you about half the stat for under half the seals. Levels 12 → 18 double it again, but they also need Seals of Mystery Tome, and that’s the seal to save.
Lab status · Observed
Where this comes from: the community Tome Upgrade Cost Table (0–18) in the official Lands of Jail Discord #master-guides (27 Sep 2026; table by WaysToDie, credit Heart of War × [MOV]), checked against MIRÖX’s Tome 101 table (0–12, LOJXLab Community Discord, January 2026).
Sample (rough): S216, MIRÖX’s own tome upgrades, MIRÖX’s estimate.
Not yet measured: how fast a typical player earns each seal per week.
What would change this: a game update to tome costs, stats or max level, or an in-game screen showing a different number. Send us a screenshot.
What you’re upgrading
Each troop type (Shield, Bomber, Shooter) has 6 tomes, and each tome goes from level 0 to 18. Upgrades cost three seals:
- Seal of Wisdom (some players and older tables call it Seal of Skill)
- Seal of Knowledge (also called Seal of Power)
- Seal of Mystery Tome, needed only from 12 → 13 onward
Cost per tome, level by level
| Level | Seal of Wisdom | Seal of Knowledge | Seal of Mystery Tome | Bonus stat |
|---|---|---|---|---|
| 0 → 1 | 10 | 10 | – | 18.90% |
| 1 → 2 | 50 | 60 | – | 25.20% |
| 2 → 3 | 90 | 110 | – | 33.60% |
| 3 → 4 | 160 | 200 | – | 39.90% |
| 4 → 5 | 270 | 330 | – | 52.50% |
| 5 → 6 | 380 | 460 | – | 63.00% |
| 6 → 7 | 480 | 600 | – | 73.50% |
| 7 → 8 | 540 | 660 | – | 84.00% |
| 8 → 9 | 620 | 780 | – | 94.50% |
| 9 → 10 | 760 | 920 | – | 105.00% |
| 10 → 11 | 920 | 1,040 | – | 115.50% |
| 11 → 12 | 1,040 | 1,240 | – | 126.00% |
| 12 → 13 | 1,040 | 1,240 | 8 | 146.00% |
| 13 → 14 | 1,080 | 1,300 | 15 | 166.00% |
| 14 → 15 | 1,080 | 1,300 | 22 | 186.00% |
| 15 → 16 | 1,120 | 1,400 | 35 | 206.00% |
| 16 → 17 | 1,120 | 1,400 | 50 | 226.00% |
| 17 → 18 | 1,180 | 1,540 | 66 | 250.00% |
| Total 0 → 12 | 5,320 | 6,410 | 0 | |
| Total 0 → 18 | 11,940 | 14,590 | 196 |
Totals for a full set
| Goal | Seal of Wisdom | Seal of Knowledge | Seal of Mystery Tome |
|---|---|---|---|
| 6 tomes of one troop type to 12 | 31,920 | 38,460 | 0 |
| 6 tomes of one troop type to 18 | 71,640 | 87,540 | 1,176 |
| All 3 troop types to 18 (18 tomes) | 214,920 | 262,620 | 3,528 |
What the numbers tell you
- Level 12 is the halfway mark. 0 → 12 reaches 126%, about half of the 250% max, for about 45% of the Wisdom and Knowledge.
- After 12, each level is worth twice as much. Up to 12 a level adds about +10.5%. From 12 → 18 each level adds +20% to +24% for a similar Wisdom and Knowledge cost.
- Mystery Tome is the bottleneck. It’s only needed after 12, and the last level alone takes 66. Never spend it on a troop type you don’t use.
- The early levels are almost free. 0 → 6 costs 960 Wisdom and 1,170 Knowledge per tome, about 8% of the full cost.
Set bonus: MIRÖX’s earlier table also lists an extra bonus for the full set of 6 tomes, in four steps up to level 12: 12%, 23%, 34% and 45%. The official table doesn’t show it, so treat it as Observed until we confirm the bonus past 12.
Before your next tome upgrade
- Count your Seals of Wisdom, Knowledge and Mystery Tome.
- Pick one troop type first, the one your main march uses.
- Bring all 6 of its tomes to 12 before pushing any tome past it.
- Save Mystery Tome for that troop type only, and plan the 12 → 18 push around how many you have.
Source: Tome Upgrade Cost Table (0–18) in the official Lands of Jail Discord (join here). More progression guides: Trove Collection 101 and Hero Equipment. Everything on growing your account is on the progression hub.
Confidence rises when an independent operator reproduces a result. If your numbers contradict ours, that is worth just as much — we publish corrections at the same volume as the original claim.