Drop Rates

This page explains how item drops work on MuhRO: the server rates, the Low Rate Drop Boost, drop gear, drop buffs and the KS penalty - and how they all combine.

The short version

• Base rates are 25x (items/equips), 50x (cards) and 4x (MVP cards), with logarithmic scaling: the rarer the item, the more of the multiplier it gets.
• Normal cards are capped at 0.2%, MVP cards at 0.04% (before buffs).
• Playing at reduced EXP rates gives a permanent personal drop boost of up to +50% (full effect at Base Lv 250). Changing your EXP rate later removes it forever.
• Drop gear and drop buffs (Bubble Gum, Happy Hour and so on) are added together into one bonus percentage and multiply your final drop chance.
• Repeatedly trying to kill-steal gives you a KS Penalty debuff: -10% (and worse) to drops, EXP and zeny.
• LUK does not affect drop rates and neither does monster size.

How a drop is decided

When a monster dies, every item on its drop list is rolled separately, in three steps:

1. Base rate - the item's official drop chance on that monster.
2. Server rate - the base rate is multiplied by the server multiplier using a logarithmic curve, then capped (see below). This is the rate everyone gets, no gear, no buffs.
3. Your personal modifiers - the Low Rate Drop Boost raises the rate from step 2, then all your percentage bonuses (gear, buffs, Happy Hour, minus any KS penalty) are summed up and multiply the result.

The final chance is capped at 90% (drops that are naturally above 90% stay as they are).

Server drop rates

Drop type	Multiplier
Items, consumables, equipment (incl. from boss/MVP monsters)	25x
MVP reward items (the prize placed directly in the killer's inventory)	25x
Normal cards	25x - capped at 0.2%
MVP cards	4x - capped at 0.04%

Logarithmic scaling

The multiplier is not applied 1:1. Rare items get (nearly) the full multiplier, common items much less - otherwise everything common would simply be 100%. In practice, at 25x:

Official base rate	Rate on MuhRO	Effective multiplier
0.01%	0.25%	25x
0.1%	1.6%	16x
1%	9%	9x
10%	40%	4x
50%	~85%	1.7x
100%	100%	1x

Cards

Cards use a 50x multiplier, but a base 0.01% card would land at 0.5% - above the 0.2% card cap, so effectively every normal card drops at 0.2% (1 in 500) before your personal bonuses. MVP cards are capped at 0.04% (1 in 2500). Your drop gear and buffs still multiply these numbers afterwards.

Low Rate Drop Boost

When you create a character (Base/Job Lv 1), the EXP-Settings NPC (Main Office and prt_fild08) offers a choice:

• Keep the default 50x EXP rates: no drop boost.
• Lock in reduced EXP rates: receive a permanent drop rate boost.

The maximum boost is 50 / your Base EXP rate percent (rounded down, at most +50%):

Chosen EXP rate	Max drop boost
1x	+50%
2x	+25%
5x	+10%
10x	+5%
25x	+2%
50x (default)	none

Things to know:

• The boost grows with your Base Level: you get max boost * BaseLevel / 250. At Lv 125 you have half of it, at Lv 250 the full value.
• It is applied to the item's base rate through the same logarithmic curve as the server rate - so, like the server rates, it helps rare items the most.
• Normal cards still can't exceed the 0.2% base cap, and MVP cards are not affected at all.
• It shows as a permanent status icon, survives death and can't be dispelled.
• If you ever raise or change your EXP rates at the NPC, the boost is lost forever on that character. The NPC warns you before this happens.

Drop gear

Some equipment carries "increases item drop rate by X%" bonuses. All such bonuses are added together into your personal drop bonus. Examples:

Item	Bonus
Lucky Clip	+50%
Steel Flower (costume)	+10%
Various sets/combos	+3-5% each

Drop gear stacks with drop buffs - it's all one big additive pool (see below).

Drop buffs

Timed buffs add to the same pool as drop gear:

Buff	Bonus	Duration
Bubble Gum	+100%	30 min
HE Bubble Gum	+200%	15 min
Happy Hour (event maps only)	+50%	while active on the map
Instance difficulty bonus	varies by mode	inside the instance

Happy Hour

Happy Hour runs on a fixed schedule several times per day (announced 5 minutes ahead in game and on Discord). A rolled set of maps gets, for about an hour:

• +50% drop rate, +50% EXP and +50% zeny from monsters,
• party loot sharing enabled,
• KS protection disabled on those maps - it's a free-for-all.

KS Penalty

MuhRO has kill-steal protection: enable it with @noks. While you are fighting a monster, other players' attacks on it are blocked for ~15 seconds at a time.

KS protection does not apply to: MVPs and their slaves, monsters near an MVP, PvP/GvG maps, Happy Hour maps and owners who are idle/AFK or far away.

Trying to hit someone else's protected monster is not just blocked - it punishes you:

• Every blocked attempt adds a KS Penalty stack (you see a warning: [Watch out!! - KS Penalty stacks: N]). Stacks expire after 5 minutes if you stop.
• At 10 stacks you get the KS Penalty debuff:

Stacks	Penalty	Debuff duration
10-19	-10% drops, base EXP, job EXP and zeny	5 min
20-29	-20%	10 min
30-39	-30%	15 min
...	keeps growing	keeps growing

Keep kill-stealing while penalized and the stacks - and the penalty - just keep climbing. Play nice.

How everything combines

The full order of operations:

1. Item base rate
2. x server multiplier (logarithmic), capped (0.2% cards / 0.04% MVP cards)
3. x Low Rate Drop Boost (logarithmic, level-scaled)
4. x (100% + drop gear + drop buffs + Happy Hour + instance bonus - KS penalty)
5. capped at 90%, minimum 0.01%

Worked example: rare item (0.05% base)

A weapon with an official 0.05% drop rate:

• Server rate (25x, logarithmic): 0.92% - this is what everyone gets.
• You play 1x rates at Base Lv 250 (+50% boost): 1.34%. Note this is not simply 0.92% x 1.5: the boost raises the raw multiplier from 25x to 37.5x and the logarithmic curve then compresses that, so the realized gain here is about +46%. On rarer items more of the boost comes through (a 0.01% item goes from 0.25% to 0.38%, the full +50%).
• You wear +10% drop gear, chew an HE Bubble Gum (+200%) and it's Happy Hour (+50%): total bonus 360%, so 1.34% x 3.6 = ~4.8%.

That's roughly a 1-in-21 chance instead of the official 1-in-2000.

Worked example: common item (5% base)

The same player hunting an item with an official 5% drop rate:

• Server rate (25x, logarithmic): 26.5%. The effective multiplier is only about 5.3x - common items get far less of the 25x than rare ones.
• Low Rate Drop Boost (+50% headline): 32.7%. The curve compresses it even harder here - the realized gain is only about +23%.
• Same buffs as above (total bonus 360%): 32.7% x 3.6 = 117.6%, which slams into the 90% cap - final chance 90%.

So for common items, buffs quickly stop mattering: anything that would land above 90% is simply 90%.

Common myths

• LUK does not increase drop rate. That feature is disabled here.
• Monster size does not change drops. Also disabled.
• Party members' gear/buffs don't help your roll - drop bonuses come from the player whose kill credit applies to the drop.
• Your level doesn't matter for drops - there is no bonus or penalty for being too high or too low.

Checking rates in game

@mobinfo <monster name or ID> (short: @mi) lists a monster's drops with their rates. What the numbers mean depends on your display mode, which you set with @mobinfomode:

Command	What @mobinfo shows
@mobinfomode base	Server rates - after the server multiplier and the card caps, before any personal modifiers. The same for everyone. This is the default.
@mobinfomode personal	Your effective rates - includes your Low Rate Drop Boost, drop gear, active drop buffs, Happy Hour (if you are standing on a boosted map), any KS penalty and the 90% cap.
@mobinfomode default	Back to the server default (base).

Notes:

• @mobinfomode without an argument simply toggles between base and personal.
• The setting is saved per character and survives logout.
• Personal mode is a live preview of the formula on this page: change gear, lose a buff or leave the Happy Hour map and the numbers change with you.
• @mobinforate is the same command under another name.