Sand CastleRelic
Upon pickup, Upgrade random cards.
Is Sand Castle good in Slay the Spire 2?
In Slay the Spire 2, Sand Castle is an ancient relic you can pick up on your climb. Its effect: Upon pickup, Upgrade random cards. Performance-wise it’s a steady, unspectacular pick rated C tier overall.
Over 6 tracked runs the win rate of decks holding it sits at 40.0%, 27.4% ahead of the 12.6% all-run baseline. It sees lighter play, carried in only 1.2% of runs. It does its best work in the hands of the Necrobinder, who post a 100.0% win rate with it. Within Necrobinder runs specifically, it’s carried 1.2% of the time.
Its standout card pairing is Ascender's Bane, which lifts the relic’s win rate by +26.7% when both are in play. It also works nicely with Strike, good for a -40.0% win-rate change. It typically enters the deck near floor 18. As an ancient relic, how often it’s offered depends on its rarity tier.
Of the runs that carried it, 2 ended in victory while 3 fell to a defeat. See the best cards, class split, and threats below for the full read on whether Sand Castle is worth grabbing.
Sand Castle Win Rate & Pick Rate
At a 40.0% win rate, Sand Castle runs 27.4% ahead of the 12.6% all-run baseline — the bars below put the two side by side.
Run Outcomes with Sand Castle
Across the 6 runs that carried Sand Castle, 2 ended in a win and 4 in a loss — a 33.3% win share, counting abandons as losses.
- Wins 33.3%
- Losses 66.7%
Best Cards with Sand Castle
The cards that gain the most from carrying Sand Castle are Ascender's Bane (+26.7%), Strike (-40.0%), and Defend (-40.0%), each shown with its win-rate swing.
Based on small co-occurring samples — treat these as early signals, not final verdicts.
Sand Castle Win Rate by Class
Of the 3 classes that carry Sand Castle, it performs best with Necrobinder (100.0%), Silent (0.0%), and Ironclad (0.0%).
Sand Castle Details
Carried in 1.2% of runs, Sand Castle is an ancient relic typically acquired near floor 18.
Upon pickup, Upgrade random cards.
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Sand Castle – Frequently Asked Questions
Is Sand Castle good in Slay the Spire 2?
Across 6 tracked runs carrying it, Sand Castle wins 40.0% of the time — +27.4% above the average run. Win rate reflects how often runs with the relic end in victory.
What does Sand Castle do in Slay the Spire 2?
Upon pickup, Upgrade random cards.
How rare is Sand Castle in Slay the Spire 2?
Sand Castle is an Ancient relic, picked up in 1.2% of tracked runs.
What is the best card to use with Sand Castle?
In tracked runs, Sand Castle has performed best alongside Ascender's Bane, which lifts its win rate by +26.7% over 4 runs together.
Which class is Sand Castle best in?
Sand Castle has its highest win rate with The Necrobinder (100.0%).
See Also
Keep exploring Slay the Spire 2 tier lists and stats below.