MewGenius Answerbook Risk: Low

Medium Slime Boss Guide

Safest opener, biggest mistakes, and the cleanest way to beat Medium Slime in Mewgenics.

HP 16 MV 3

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Fast answer

Read this first

Main idea

Control space first; then kill.

Biggest mistakes

Killing mediums while boxed-in: the split floods nearby tiles and blocks movement.
Ignoring chain cleanup: small slimes still deal damage and steal actions.

Winning line

You kill mediums when you have space for the split.
You clean up smalls efficiently right after.

Before you start

Quick-scan notes before you commit to the fight.

Quick scan

Safest opener

Control space first; then kill.
Kill or contain spawns early before the fight snowballs.

Bring / avoid

Bring: AOE or efficient cleanup
Avoid: Single-target-only damage with no cleanup
If notes are partially unverified, assume the worst-case version until confirmed in-game.

Fight plan

The safest way to approach the fight without reading a wall of text.

Decision-first notes

Win conditions

You kill mediums when you have space for the split. You clean up smalls efficiently right after.

Opener

Control space first; then kill.

Midfight

Kill one medium, clean smalls, repeat.

Finisher

Don’t leave a field full of smalls while chasing another target.

Detailed notes

Positioning, run killers, and loadout reminders.

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Run killers

Killing mediums while boxed-in: the split floods nearby tiles and blocks movement.
Ignoring chain cleanup: small slimes still deal damage and steal actions.

Positioning rules

Before lethal, make sure adjacent tiles are not all occupied by allies.
Avoid killing multiple mediums in the same cramped corner back-to-back.

Loadout hints

AOE or efficient cleanup

Single-target-only damage with no cleanup

Source: boss-chp3.csv · Last tested: 2026-03-02 · Some move values are still being confirmed in live runs.

Detailed notes

Mechanics, background notes, extra item links, and deeper context.

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About Medium Slime

Mid-tier split unit; the ‘space check’ matters more than DPS.

Type: Boss

Mechanics snapshot

Main mechanics

On-Death Split Summon/Spawn

Key triggers

On death splits into 4 Small Slimes (space-dependent)

Moves to know

Melee attack

~5 melee damage (per notes).

On Death

Splits into 4 Small Slimes (spawn rules unverified).

FAQ

Quick answers to the most common questions about this fight.

How do you beat Medium Slime in Mewgenics? ▾

Focus on the main loss pattern first: Killing mediums while boxed-in: the split floods nearby tiles and blocks movement. / Ignoring chain cleanup: small slimes still deal damage and steal actions.. Then follow the opener plan: Control space first; then kill..

What does Medium Slime do in Mewgenics? ▾

Mid-tier split unit; the ‘space check’ matters more than DPS.

Where is Medium Slime found in Mewgenics? ▾

Medium Slime appears during a later home-base defense sequence after the Boneyard progression line.

What counters Medium Slime? ▾

Bring: AOE or efficient cleanup Avoid: Single-target-only damage with no cleanup If notes are partially unverified, assume the worst-case version until confirmed in-game.