The safest way to approach the Clash of Critters Level 20-10 boss is to use a focused team, avoid spending every unit immediately, and treat the first attempt as a scouting run. The IceStory clear shows the stage as a specific boss checkpoint, so copy the deployment order and timing from the video where possible, then adjust your roster if your damage or survivability falls short.
Level 20-10 Boss Plan
Save part of your team for the boss instead of filling the field as soon as the stage begins. Early deployments should establish damage and control while leaving enough options to respond when the boss reaches your formation.
Use this basic plan:
- Start with the units that provide reliable damage or frontline support.
- Avoid committing every strong unit during the opening wave.
- Watch the boss’s approach before using your most important skills.
- Keep a reserve unit available in case the frontline collapses.
- Repeat the successful deployment order from the IceStory video before changing the entire team.
The goal is consistency. A formation that survives long enough to deliver repeated attacks is usually more useful than one that produces strong opening damage but has no recovery option.
Team Preparation
Bring a balanced roster rather than choosing units only for their highest visible damage. Level 20-10 is a boss stage, so the team must continue functioning after the initial exchange.
Before entering, check:
- Your main damage dealer is upgraded as far as your current resources allow.
- At least one unit can protect or reinforce the frontline.
- Your team has enough sustained damage to finish the encounter.
- You have a replacement ready for a unit that is defeated early.
- Any important skill or ability is available before the boss phase.
Do not rebuild the entire roster after one failed attempt. First identify whether the problem was low damage, poor timing, or a frontline that disappeared too quickly.
Deployment Timing
Deployment timing matters more than placing every available unit immediately. Use the opening section to learn how quickly the stage advances, then reserve your strongest options for the moment they can attack the boss safely.
A practical sequence is:
- Establish your initial frontline and one dependable damage source.
- Add support only when the first formation needs it.
- Hold at least one strong unit for the boss encounter.
- Deploy the reserve when the boss enters effective attack range.
- Use remaining units to maintain pressure after the first exchange.
If the boss defeats your first frontline, avoid panicking and spending everything at once. Replace the lost unit, protect your damage dealers, and continue the planned rotation.
Fixing Failed Attempts
Most failed Level 20-10 attempts can be traced to one of three problems: the team deals damage too slowly, the frontline falls before the damage dealers can work, or key units are deployed too early.
| Problem | Adjustment |
|---|---|
| The boss survives too long | Improve your main damage source or delay weaker deployments so stronger units receive more time to attack |
| The frontline collapses early | Add better protection, upgrade the front unit, or deploy support sooner |
| Strong units are defeated before the boss | Keep them in reserve and wait for a safer deployment window |
| The opening looks successful but the boss ends the run | Save a replacement unit and avoid using every ability before the boss phase |
| The same unit repeatedly fails | Test a different role or use the IceStory clear to compare placement and timing |
Make one change per retry. This shows whether the adjustment solved the real problem and prevents random roster changes from hiding the cause of the loss.
Using the IceStory Clear
The IceStory video is most useful as a visual reference for the Level 20-10 boss sequence. Pay attention to when units appear, which positions remain occupied, and how the team responds once the boss reaches the main formation.
When comparing your attempt with the video, focus on:
- The first unit deployed.
- The spacing between early deployments.
- Which units are held back.
- The timing of major skills.
- The point where the boss begins receiving concentrated damage.
- Whether a reserve unit is used after the first defeat.
If your roster differs from the one shown, copy the decisions rather than the exact lineup. Match each demonstrated unit to your own roster by role: frontline, sustained damage, support, or emergency replacement.
Quick Clear Checklist
Use this checklist before retrying Level 20-10:
- Confirm that your main damage unit is ready.
- Bring a dependable frontline.
- Keep one useful unit in reserve.
- Avoid opening with every high-value deployment.
- Save key abilities for a high-impact window.
- Compare your timing with the IceStory clear.
- Change only one part of the formation after each failed attempt.
Once the boss is defeated, record the deployment order that worked. That gives you a repeatable clear instead of relying on a single lucky attempt.
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Player Comments
68 players commented on this guide.
This helped me understand strategy much better.
This saved me time in the early game.
I wish I had read this before upgrading the wrong thing.
Good guide for Clash of Critters players. The strategy part was useful.