If you just started Slay the Spire 2, you’re probably wondering:
Why are characters unlocking so fast?
And is this “Mechanical Heart” build on Defect actually broken?
I’ve been running multiple runs on pl2w, testing different builds — so this isn’t theorycraft. This is real “what actually works” talk.
1. Character Unlocking (Way Easier Than You Think)
Most people assume you need to beat the game.
You don’t. Just start a run, and the next character unlocks.
Yep. No win required.
Unlock order:
Ironclad
Silent
Heir (Prince)
Necrobinder
Defect (the robot)
Pro tip: unlock everyone first. It helps way more than forcing one build early.
2. Quick Breakdown (No BS)
Ironclad
Safe, tanky, beginner-friendly.
Silent
Card draw + poison = smooth scaling.
Heir
Slow start, insane late game.
Necrobinder
Summon + loop builds, high skill ceiling.
Defect
This is where things get interesting.
Lightning builds = easy damage
Claw builds = meme but works
Mechanical Heart = real endgame scaling
3. Mechanical Heart Build (Why Everyone Talks About It)
Simple version:
It’s a scaling engine that snowballs out of control
Early game = survive.
Late game = you break the game.
Why it’s strong
1. Energy loop feels infinite
10+ cards per turn isn’t rare
You stop worrying about energy
2. Orb engine goes crazy
Lightning = DPS
Frost = defense
Plasma = energy
This build pushes the orb system to its limit.
3. Late game scaling is absurd
If you survive early:
bosses just melt
4. Real Tier Take
| Build | Power | Difficulty | Consistency |
|---|---|---|---|
| Strength | Mid | Low | High |
| Poison | High | Mid | High |
| Summon | High | High | Mid |
| Mechanical Heart | T1 | High | Mid |
Verdict:
High risk, high reward.
5. Should Beginners Play It?
Honestly, no.
You need:
Deck control
Energy management
Good pathing decisions
6. Tips That Actually Matter
Don’t force the build early
Keep your deck thin
Prioritize draw + energy cards
Be ready before bosses
Slay the Spire 2 is all about breaking the system.
If you want consistency → play safe builds.
If you want to go crazy → Mechanical Heart Defect is the way.
Run a few games on pl2w — you’ll see why people are obsessed with it.