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Research · Defense
Moat Works
A ring of water no siege tower fords easily — raises troop defense further.
- Entity ID
moat_works- Branch
- Defense
- Stat buffed
defense— Defense- Bonus per level
- +1.2%
- Maximum level
- 10
- Bonus at maximum level
- +12%
- Power per level
- 76
- Power at maximum level
- 760
- Base study time
- 35 seconds
- Study time at maximum level
- 23m 43s
- Prerequisites
- Stonework at level 8
Cost, time and bonus at every level
Moat Works runs to level 10, adding +1.2% to defense and 76 power each time. Studying it out costs the four soft resources — the same amount of each — and takes 23m 43s for the final level alone. Gems are only ever the optional instant finish; the study itself is bought with what your fields already make.
| Level | Total defense | Power | Study time | Each resource | Gems to finish instantly |
|---|---|---|---|---|---|
| 1 | +1.2% | 76 | 2m 14s | 12,000 | 3 |
| 2 | +2.4% | 152 | 2m 54s | 15,600 | 3 |
| 3 | +3.6% | 228 | 3m 47s | 20,280 | 4 |
| 4 | +4.8% | 304 | 4m 55s | 26,364 | 5 |
| 5 | +6% | 380 | 6m 23s | 34,273 | 7 |
| 10 | +12% | 760 | 23m 43s | 127,254 | 24 |
Taken from nothing to level 10 that is 1h 35m of raw study and 511,434 of each of food, wood, stone and iron — 2,045,736 resources in total.
Where it sits in the tree
Moat Works belongs to the Defense branch — the walls line — what an attacker has to get through before they reach your granary. It stays locked until Stonework reaches level 8. Studying it opens 1 further tech.
| Tech | Branch | Requires this tech at level |
|---|---|---|
| Deep Cisterns | Defense | 5 |
The road here: Weaponry to level 3 → Armor to level 8 → Fortification to level 5 → Stonework to level 8 → Moat Works. That is 4 studies standing between a fresh Academy and this one.
| Prerequisite | Level required | Each resource | Study time |
|---|---|---|---|
| Weaponry | 3 | 47,880 | 40m 47s |
| Armor | 8 | 286,292 | 4h 3m |
| Fortification | 5 | 108,517 | 1h 32m |
| Stonework | 8 | 286,292 | 45m 44s |
| Total before you may begin | — | 728,981 | 7h 2m |
What it eventually opens: 1 study sits downstream of Moat Works, counting every remove.
| Study | Steps out | Buffs | At its cap | Study time at cap |
|---|---|---|---|---|
| Deep Cisterns | 1 | defense | +7.2% | 13m 3s |
Numerically twinned with Battlements. Same cap, same rate per level, same study time, same power — the figures on those pages match these exactly. What separates them is the flavour and, more usefully, what each one gates: this one opens Deep Cisterns, while Battlements opens Portcullis. If you only want the bonus, take whichever is cheaper to reach; if you are building toward something, take the one that gates it.
Related
Guide: Research & the Academy · Research Priorities. Studied at the Maester's Academy. Index: all 81 studies · the whole database.
Rest of the Defense branch: Fortification · Siege Craft · Palisades · Stonework · Watchtowers · Battlements · Portcullis · Curtain Walls · Barbicans · Gatehouses · Counter-Siege · Murder Holes · Arrow Slits · Siege Engineering · Concentric Castles · Deep Cisterns · Bombardment Doctrine
Every figure above is generated from the shipped game code — the same constants and formulas the running game uses — and regenerated whenever the balance changes. Nothing on this page is hand-typed.