MewGenius Answerbook Risk: Medium

Big Slime Boss Guide

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

HP 64 MV 4

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Fast answer

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Main idea

Take center space and spread; don’t rush the kill immediately.

Biggest mistakes

Killing it at the wrong time: the split floods the board when you have no lanes.
Clumping in front of trample: you lose multiple units in a line.

Winning line

You prepare space before the kill (open tiles for the split).
You can clear the split spawns efficiently (AOE or strong cleanup turns).

Before you start

Quick-scan notes before you commit to the fight.

Quick scan

Safest opener

Take center space and spread; don’t rush the kill immediately.
Hold a defensive response for bonus-turn sequences instead of greedily racing damage.
Respect trample lines and do not let your backline sit directly behind your frontline.
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 prepare space before the kill (open tiles for the split). You can clear the split spawns efficiently (AOE or strong cleanup turns). You maintain spacing to deny trample value.

Opener

Take center space and spread; don’t rush the kill immediately.

Midfight

Chip while preparing the arena for the split (open tiles + safe lanes).

Finisher

Kill when your next turn can clear multiple mediums or safely reposition away from them.

Detailed notes

Positioning, run killers, and loadout reminders.

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Run killers

Killing it at the wrong time: the split floods the board when you have no lanes.
Clumping in front of trample: you lose multiple units in a line.
Ignoring the post-split cleanup: medium → small chain can snowball turns.

Positioning rules

Before lethal, move units to create multiple open tiles near the death location.
Don’t stand in a straight lane in front of a trample unit.
After split, prioritize cleanup targets that threaten immediate damage.

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 Big Slime

Split boss; fight is about timing the kill and managing spawns.

Type: Boss

Mechanics snapshot

Main mechanics

Bonus Turns Trample Summon/Spawn On-Death Split

Key triggers

On death splits into 4 Medium Slimes Trample lines punish clumping

Moves to know

Melee attack

~10 melee damage (per notes).

On Death

Splits into 4 Medium Slime units.

FAQ

Quick answers to the most common questions about this fight.

How do you beat Big Slime in Mewgenics? ▾

Focus on the main loss pattern first: Killing it at the wrong time: the split floods the board when you have no lanes. / Clumping in front of trample: you lose multiple units in a line.. Then follow the opener plan: Take center space and spread; don’t rush the kill immediately..

What does Big Slime do in Mewgenics? ▾

Split boss; fight is about timing the kill and managing spawns.

Where is Big Slime found in Mewgenics? ▾

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

What counters Big 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.