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Research · Defense
Murder Holes
Oil and arrows through the gatehouse floor — raises troop attack when breaking a wall.
- Entity ID
murder_holes- Branch
- Defense
- Stat buffed
attack— Attack- Bonus per level
- +1.2%
- Maximum level
- 10
- Bonus at maximum level
- +12%
- Power per level
- 80
- Power at maximum level
- 800
- Base study time
- 35 seconds
- Study time at maximum level
- 22m 26s
- Prerequisites
- Siege Craft at level 5
Cost, time and bonus at every level
Murder Holes runs to level 10, adding +1.2% to attack and 80 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 attack | Power | Study time | Each resource | Gems to finish |
|---|---|---|---|---|---|
| 1 | +1.2% | 80 | 35s | 3,000 | 50 |
| 2 | +2.4% | 160 | 53s | 4,200 | 70 |
| 3 | +3.6% | 240 | 1m 19s | 5,880 | 98 |
| 4 | +4.8% | 320 | 1m 58s | 8,220 | 137 |
| 5 | +6% | 400 | 2m 57s | 11,520 | 192 |
| 10 | +12% | 800 | 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
Murder Holes belongs to the Defense branch — the walls line — what an attacker has to get through before they reach your granary. It stays locked until Siege Craft reaches level 5. Studying it opens 1 further tech.
| Tech | Branch | Requires this tech at level |
|---|---|---|
| Arrow Slits | Defense | 5 |
The road here: Weaponry to level 3 → Armor to level 8 → Fortification to level 5 → Siege Craft to level 5 → Murder Holes. 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 |
| Siege Craft | 5 | 32,820 | 37m 23s |
| Total before you may begin | — | 181,860 | 3h 36m |
What it eventually opens: 1 study sits downstream of Murder Holes, counting every remove.
| Study | Steps out | Buffs | At its cap | Study time at cap |
|---|---|---|---|---|
| Arrow Slits | 1 | attack | +9.6% | 9m 58s |
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 · Moat Works · Battlements · Portcullis · Curtain Walls · Barbicans · Gatehouses · Counter-Siege · 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.