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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
- 22m 26s
- 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 22m 26s 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 |
|---|---|---|---|---|---|
| 1 | +1.2% | 76 | 35s | 3,000 | 50 |
| 2 | +2.4% | 152 | 53s | 4,200 | 70 |
| 3 | +3.6% | 228 | 1m 19s | 5,880 | 98 |
| 4 | +4.8% | 304 | 1m 58s | 8,220 | 137 |
| 5 | +6% | 380 | 2m 57s | 11,520 | 192 |
| 10 | +12% | 760 | 22m 26s | 61,980 | 1,033 |
Taken from nothing to level 10 that is 1h 6m of raw study and 209,400 of each of food, wood, stone and iron — 837,600 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. Nothing further in the tree depends on it, so it is a leaf: worth taking for its own bonus, never as a stepping stone.
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 | 13,080 | 12m 40s |
| Armor | 8 | 103,140 | 2h 11m |
| Fortification | 5 | 32,820 | 35m 10s |
| Stonework | 8 | 103,140 | 24m 39s |
| Total before you may begin | — | 252,180 | 3h 23m |
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 nothing further, 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 66 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
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.