ColossusSkill
Gain 5 Block. You receive 50% less damage from Vulnerable enemies this turn.
Is Colossus good in Slay the Spire 2?
In Slay the Spire 2, Colossus is an uncommon skill from the Ironclad card pool. Its effect: Gain 5 Block. You receive 50% less damage from Vulnerable enemies this turn. Right now it’s a premium pick that sits at B tier — one of the better cards you can add to a deck this run.
Over 115 tracked runs its win rate sits at 35.0%, 16.1% ahead of the 18.9% all-deck baseline. It sees niche play, included in only 3.0% of eligible runs. Within Silent runs it’s drafted 0.1% of the time, making it a regular part of that class’s decks. Decks that include it run about 1.1 copies on average.
Its standout pairing so far is Cruelty, which lifts its win rate by +19.4% when the two share a deck. On the relic side, Petrified Toad is its standout companion, worth a +22.5% win-rate swing alongside it. It costs 1 energy, gets upgraded 25.4% of the time, and tends to be picked up near floor 14.
Upgrading the card adds +3 Block to its stat line. Of the runs that drafted it, 35 ended in victory against 65 deaths and 15 abandons. Its most common run-ender is Kaiser Crab Boss, finishing 7.0% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Colossus fits a Ironclad deck.
Colossus Win Rate & Pick Rate
At a 35.0% win rate, Colossus runs 16.1% ahead of the 18.9% all-deck baseline — the bars below put the two side by side.
Run Outcomes with Colossus
Across the 115 tracked runs that drafted Colossus, 35 ended in a win and 80 in a loss — a 30.4% win share, counting abandons as losses.
- Wins 30.4%
- Losses 69.6%
Best Relics for Colossus
The relics that swing Colossus’s win rate the most are Petrified Toad (+22.5%), Intimidating Helmet (+20.9%), and Strawberry (+20.0%), with each lift shown.
Petrified Toad10 runs
Intimidating Helmet7 runs
Strawberry20 runs
The Chosen Cheese12 runs
Red Skull11 runs
Vajra25 runsBased on small co-occurring samples — treat these as early signals, not final verdicts.
Colossus Card Details
A 1-energy uncommon skill, Colossus is upgraded 25.4% of the time and tends to enter the deck around floor 14.
Gain 5 Block. You receive 50% less damage from Vulnerable enemies this turn.
Upgrade: +3 Block
What Ends Runs with Colossus
Runs holding Colossus end most often against Kaiser Crab Boss (7.0%), Decimillipede Elite (5.2%), and Test Subject Boss (5.2%) — the share of its runs each accounts for is shown.
- Kaiser Crab Boss7.0% of runs
- Decimillipede Elite5.2% of runs
- Test Subject Boss5.2% of runs
- Knowledge Demon Boss4.3% of runs
- Queen Boss4.3% of runs
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Colossus – Frequently Asked Questions
Is Colossus good in Slay the Spire 2?
Across 115 tracked runs, Colossus has a 35.0% win rate — +16.1% above the average deck. Win rate reflects how often runs that include the card end in victory.
What does Colossus do in Slay the Spire 2?
Colossus costs 1 energy. Gain 5 Block. You receive 50% less damage from Vulnerable enemies this turn.
What class is Colossus in Slay the Spire 2?
Colossus is an Uncommon Ironclad Skill.
Is Colossus worth upgrading in Slay the Spire 2?
Players upgrade Colossus in 25.4% of runs. Upgrading it grants +3 Block.
What is the best relic for Colossus?
In tracked runs, Colossus has performed best alongside Petrified Toad, which lifts its win rate by +22.5% over 10 runs together.
See Also
Keep exploring Slay the Spire 2 tier lists and stats below.