- Win Rate
- 16.1%
- Pick Rate
- 0.1%
- Δ vs Avg
- +2.3
Hello World Power
- Type
- Power
- Rarity
- Event
- Cost
- 1
- Class
- Event
- Methodology
- Data Methodology
- Author
- Dakota Chinnick
At the start of your turn, add a random Common card into your Hand.
Is Hello World good in Slay the Spire 2?
In Slay the Spire 2, Hello World is an event power from the Event card pool. Its effect: At the start of your turn, add a random Common card into your Hand. The data flags it as a weaker pick, settling at D tier — usually one to pass on unless your deck specifically wants it.
Over 31 tracked runs its win rate sits at 16.1%, 2.3% ahead of the 13.8% all-deck baseline. It sees niche play, included in only 0.1% of eligible runs. Within Silent runs it’s drafted 0.2% of the time, making it a regular part of that class’s decks. Decks that include it run about 1.0 copies on average.
Its standout pairing so far is Ascender's Bane, which lifts its win rate by -3.7% when the two share a deck. It costs 1 energy, gets upgraded 21.9% of the time, and tends to be picked up near floor 8.
Of the runs that drafted it, 5 ended in victory against 26 deaths and 0 abandons. Its most common run-ender is Lagavulin Matriarch Boss, finishing 12.9% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Hello World fits a Event deck.
Hello World Win Rate & Pick Rate
At a 16.1% win rate, Hello World runs 2.3% ahead of the 13.8% all-deck baseline — the bars below put the two side by side.
Run Outcomes with Hello World
Across the 31 tracked runs that drafted Hello World, 5 ended in a win and 26 in a loss — a 16.1% win share, counting abandons as losses.
- Wins 16.1%
- Losses 83.9%
When to Pick Up Hello World
Of the 1 pickup windows recorded for Hello World, Act 1 is the best: 16.1% across 31 runs.
Win rate of runs by the act Hello World entered the deck. Acts that have not reached the sample floor show their run count only.
Best Cards to Pair with Hello World
Hello World’s strongest card pairings so far are Ascender's Bane (-3.7%), each shown with the win-rate lift it adds.
Based on small co-occurring samples — treat these as early signals, not final verdicts.
Hello World Win Rate by Class
Exclusive to the Silent, Hello World posts a 36.4% win rate over 11 tracked runs.
The Silentappears in 0.2% of its runs (11 tracked)Hello World Card Details
A 1-energy event power, Hello World is upgraded 21.9% of the time and tends to enter the deck around floor 8.
At the start of your turn, add a random Common card into your Hand.
What Ends Runs with Hello World
Runs holding Hello World end most often against Lagavulin Matriarch Boss (12.9%), Waterfall Giant Boss (9.7%), and Decimillipede Elite (9.7%) — the share of its runs each accounts for is shown.
- Lagavulin Matriarch Boss12.9% of runs
- Waterfall Giant Boss9.7% of runs
- Decimillipede Elite9.7% of runs
- Test Subject Boss9.7% of runs
- The Insatiable Boss9.7% of runs
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Hello World – Frequently Asked Questions
Is Hello World good in Slay the Spire 2?
Across 31 tracked runs, Hello World has a 16.1% win rate — +2.3% above the average deck. Win rate reflects how often runs that include the card end in victory.
What does Hello World do in Slay the Spire 2?
Hello World costs 1 energy. At the start of your turn, add a random Common card into your Hand.
What class is Hello World in Slay the Spire 2?
Hello World is an Event Event Power.
Is Hello World worth upgrading in Slay the Spire 2?
Hello World can be upgraded at a rest site to improve its effect.
See Also
Keep exploring Slay the Spire 2 tier lists and stats below.