Zen: earning and spending

How much zen drops per monster at each level, how much the NPC pays, potion and ammo prices, repair cost and the reference income per level.

Zen is scarce on purpose: almost everything that comes in is from monster zen piles and NPC sales of junk, and what goes out is spent on repair, potions, Chaos Machine, VIP, travel and fees. The numbers below come from the game code. Currency overview at Zen.

Monster zen piles#

Each kill has a 30% chance to drop a zen pile. The expected value per kill is 0.01 × level² + 0.6 × level + 2; the pile itself ranges from 60% to 140% of expected ÷ 30%. Zen bonuses from equipment, VIP and guild apply only to the pile (not to sales).

10 rows


10	9	18 – 42	8,100
20	18	36 – 84	16,200
30	29	58 – 135	26,100
40	42	84 – 196	37,800
60	74	148 – 345	66,600
80	114	228 – 532	102,600
100	162	324 – 756	145,800
120	218	436 – 1,017	196,200
130	249	498 – 1,162	224,100
150	317	634 – 1,479	285,300

NPC sale#

The NPC pays [(required level or item level) × 350 + durability × 5] × (1 + item level × 0.5) × (1 + 0.1 Luck + 0.1 Skill + 0.1 × option) × 0.09, and never more than 20% of the item shop price. The same applies to “sell all” and to auto-sell with a full inventory (which has no VIP bonus). Only Common and Uncommon are bought.

10 rows


Rapier	9	293	969	11,940
Pad Armor	10	327	1,081	11,830
Serpent Sword	30	961	3,171	56,170
Robust Armor	30	961	3,171	57,170
Lighting Sword	59	1,881	6,207	174,000
Gru Hill Armor	60	1,913	6,314	183,550
Sword of Destruction	82	2,620	8,648	317,780
Black Dragon Armor	90	2,868	9,465	376,610
Daybreak	115	3,663	12,087	593,890
Dark Soul Armor	122	3,876	12,793	659,435

Potions and ammo#

Fixed price, the same at any NPC. The +1 costs the same as the +0, and a bought potion fills the stack you already have in the inventory:

11 rows


Apple	30
Small Healing Potion	150
Small Mana Potion	150
Healing Potion	450
Mana Potion	450
Large Healing Potion	1,300
Large Mana Potion	1,300
Antidote	200
Town Portal Scroll	2,500
Arrow	+0: 300 · +1: 600 · +2: 900 · +3: 1,200
Bolt	+0: 300 · +1: 600 · +2: 900 · +3: 1,200

Repair#

The cost follows the item value: 0.022 × (item price by its level)^0.8 × missing durability fraction. VIP gives a discount on the total. Cost of a full repair (from 0 to max) per piece:

10 rows


Rapier	9	41	182
Pad Armor	10	40	181
Serpent Sword	30	139	628
Robust Armor	30	141	637
Lighting Sword	59	343	1,551
Gru Hill Armor	60	358	1,619
Sword of Destruction	82	555	2,511
Black Dragon Armor	90	636	2,876
Daybreak	115	915	4,141
Dark Soul Armor	122	995	4,502

Wear details at Durability and repair.

Reference income per level#

The economy was calibrated for the average player (900 kills per hour on a map of their level, selling the junk). Repair and potions should cost at most 15% of the income:

5 rows


10	8,100	12,000 – 20,000	≤ 3,000
30	26,100	35,000 – 60,000	≤ 9,000
60	66,600	90,000 – 150,000	≤ 22,500
100	145,800	220,000 – 380,000	≤ 57,000
130	224,100	350,000 – 600,000	≤ 90,000

Code reference: shared/src/economia.ts → ZEN_PILHA_CHANCE, zenPorAbate, zenDaPilha, valorVendaNpc, VENDA_FRACAO, PRECO_FIXO_LOJA, precoLoja, custoReparo, ALVO_RENDA_H · tools/dev/sim-economia.ts