Loop•Power

Is Loop good in Slay the Spire 2?

Loop is an uncommon Defect power in Slay the Spire 2. In combat it resolves as: At the start of your turn, trigger the passive ability of your rightmost Orb. It currently underperforms most alternatives, sitting at F tier in our Slay the Spire 2 card rankings.

Across 105 recorded runs, decks running it win 21.7% of the time, comfortably clear of the 18.9% average, by 2.8%. It’s a more selective pick, turning up in just 2.8% of decks that could run it. Defect players keep it in 18.0% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.3 times in the decks that take it.

It performs best next to Machine Learning — together they post a +20.6% swing in win rate. It also has strong chemistry with the relic Data Disk, which moves its win rate by +26.5%. At 1 energy, it’s upgraded in 42.0% of runs and usually joins the deck around floor 18.

That’s 20 wins, 72 deaths, and 13 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Queen Boss, which closes out 7.6% of its appearances. Read on for Loop’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Defect run.

Best Cards to Pair with Loop

Ranked by win-rate lift, Loop performs best alongside Machine Learning (+20.6%), All for One (+14.6%), and Trash to Treasure (+14.1%).

Machine Learning+20.6%16 runsAll for One+14.6%8 runsTrash to Treasure+14.1%10 runsSmokestack+12.4%13 runsBuffer+12.4%12 runsEcho Form+12.4%13 runs

Based on small co-occurring samples — treat these as early signals, not final verdicts.

Loop Win Rate by Class

Loop is drafted only by the Defect, where it holds a 21.7% win rate across 105 runs.

The Defectappears in 18.0% of its runs (105 tracked)

Best Relics for Loop

Loop pairs best with the relics Data Disk (+26.5%), Fragrant Mushroom (+20.5%), and Sword of Jade (+19.4%), ranked by win-rate lift.

Data Disk+26.5%9 runsFragrant Mushroom+20.5%9 runsSword of Jade+19.4%5 runsParrying Shield+16.9%7 runsPendulum+15.9%19 runsVenerable Tea Set+15.4%13 runs

Based on small co-occurring samples — treat these as early signals, not final verdicts.

Loop Card Details

Loop is an uncommon power costing 1 energy; it’s upgraded in 42.0% of runs and usually picked up by floor 18.

At the start of your turn, trigger the passive ability of your rightmost Orb.

What Ends Runs with Loop

Loop’s most common run-enders are Queen Boss (7.6%), Kaiser Crab Boss (6.7%), and Entomancer Elite (4.8%).

• Queen Boss7.6% of runs
• Kaiser Crab Boss6.7% of runs
• Entomancer Elite4.8% of runs
• Knowledge Demon Boss4.8% of runs
• The Insatiable Boss3.8% of runs

See Also

Compare Loop with the rest of the best Slay the Spire 2 cards, relics, and classes below.