# Buildings Each building automatically produces gold per second (GPS). The empire unlocks **from Chapter 2**. Your buildings keep producing while you are offline, by default for up to **8 hours**. The [skill](https://mebulalegends.bitmeup.com/wiki/en/guide/skills/) **Diligent Sleepers** and VIP levels extend that. ## Overview | # | Building | Starting price | Base GPS | Cost factor | |---|----------|----------------|----------|-------------| | 1 | Monster Den | 10 | 0.1 | ×1.065 | | 2 | Gold Mine | 100 | 1.0 | ×1.08 | | 3 | Magic Tower | 500 | 5.0 | ×1.095 | | 4 | Dragon Keep | 5,000 | 50 | ×1.11 | | 5 | Ancient Temple | 50,000 | 500 | ×1.125 | | 6 | Mebularium | 500,000 | 5,000 | ×1.14 | | 7 | Crystal Grotto | 5,000,000 | 50,000 | ×1.16 | | 8 | Cloud Fortress | 50,000,000 | 500,000 | ×1.18 | | 9 | Forge of Fate | 500,000,000 | 5,000,000 | ×1.20 | | 10 | Cosmic Nexus | 5,000,000,000 | 50,000,000 | ×1.22 | ::: info Cost growth is tiered Each purchase of a building makes the next copy more expensive by its **own cost factor** (not a flat ×1.15). **Cheap** buildings like the Monster Den grow slowly (×1.065), **expensive** ones like the Cosmic Nexus quickly (×1.22). So you reach very high counts with cheap buildings. ::: A building unlocks the **next** one once you own **50** of it. Building 50 of your 5th building (Ancient Temple) also unlocks **prestige**. Every building can be expanded up to **1,000**, which is where all milestones end. ## Milestones (per building, multiply globally) Once a single building reaches a certain count, its production is multiplied. The bonuses stack cumulatively. | Count | Bonus | Cumulative | |-------|-------|------------| | 10 | ×2.0 | ×2 | | 25 | ×2.0 | ×4 | | 50 | ×2.0 | ×8 | | 100 | ×2.0 | ×16 | | 150 | ×1.5 | ×24 | | 200 | ×1.5 | ×36 | | 250 | ×1.5 | ×54 | | 300 | ×1.5 | ×81 | | 400 | ×1.5 | ×122 | | 500 | ×2.0 | ×243 | | 600 | ×1.5 | ×365 | | 700 | ×1.5 | ×547 | | 800 | ×1.5 | ×821 | | 900 | ×1.5 | ×1,231 | | 1000 | ×2.0 | ×2,461 | ## Super milestones (per building) Super milestones apply **per building** and stack on top of the normal milestones. From 250 on, every further threshold adds **×6**, so even a cheap building stays competitive at high counts. | Count | Bonus | Cumulative | |-------|-------|------------| | 25 | ×2 | ×2 | | 100 | ×3 | ×6 | | 250 | ×6 | ×36 | | 350 | ×6 | ×216 | | 450 | ×6 | ×1,296 | | 500 | ×6 | ×7,776 | | 600 | ×6 | ×46,656 | | 700 | ×6 | ×279,936 | | 800 | ×6 | ×1.68M | | 900 | ×6 | ×10.1M | | 1000 | ×6 | ×60.5M | ::: tip Tip The thresholds from **250** on sit close together, and each one adds ×6. Push a building past the next threshold on purpose instead of spreading your purchases thin. A single pushed building no longer dominates everything though, the top buildings share the output. ::: ## Global empire milestones (total of all buildings) A separate bonus track rewards the **sum of all** buildings. It multiplies your **entire** gold production. This is a strong incentive to mass-build lots of (especially cheap) buildings. | Total count | Bonus | Cumulative | |-------------|-------|------------| | 250 | ×1.25 | ×1.25 | | 500 | ×1.25 | ×1.56 | | 1,000 | ×1.5 | ×2.34 | | 1,500 | ×1.5 | ×3.52 | | 2,000 | ×1.75 | ×6.15 | | 3,000 | ×2 | ×12.3 | | 4,000 | ×2 | ×24.6 | | 5,000 | ×2.25 | ×55.4 | | 7,500 | ×2.5 | ×138 | | 10,000 | ×2.5 | ×346 | With 10 buildings at 1,000 each, 10,000 is the highest reachable total, so the track ends there. ## Other GPS sources | Source | Effect | |---|---| | **Prestige multiplier** | permanent, from your earned prestige points (see [Prestige](https://mebulalegends.bitmeup.com/wiki/en/guide/prestige/)) | | **Collection bonus** | Every Mebuli you **own** grants a GPS bonus by rarity (see [Mebulis](https://mebulalegends.bitmeup.com/wiki/en/guide/mebulis/)) | | [**Prestige tree**](https://mebulalegends.bitmeup.com/wiki/en/guide/prestige/) | up to ×255 via the economy nodes | | **Construction Mastery** ([skill](https://mebulalegends.bitmeup.com/wiki/en/guide/skills/)) | +8 % per level | | [**Guild research**](https://mebulalegends.bitmeup.com/wiki/en/guide/guild/) | Gold vein, +2 % per level | | **VIP level** | permanently up to +20 % | | **Gold rush** | temporarily ×2, ×5, ×10, ×25 or ×50 | ## Spending gold Gold is the one currency that keeps growing practically without limit in the endgame. Accordingly there are several sinks: | Sink | Details | |---|---| | **Buildings** | the main sink, up to 1,000 per building | | **Energy upgrades at the bazaar** | two upgrades with 20 levels each: **+25 max energy** or **+8 % regeneration rate** per level; costs rise super-exponentially | | [**Guild donation**](https://mebulalegends.bitmeup.com/wiki/en/guide/guild/) | 1 % of your lifetime gold per day | ## Strategy - **Early:** Build Monster Dens until the Gold Mine is affordable, then prioritize the most expensive building you can buy. - **Mid:** Keep an eye on milestone thresholds, the missing buildings up to the next ×2 bonus can double your GPS. - **Late:** The **Auto-Builder** [skill](https://mebulalegends.bitmeup.com/wiki/en/guide/skills/) extends your build sessions up to 4 hrs 20 min, and the [prestige tree](https://mebulalegends.bitmeup.com/wiki/en/guide/prestige/) multiplies your GPS massively. The **Build Advisor** always shows you which purchase pays off most right now.