Spectrum Shift Power

Is Spectrum Shift good in Slay the Spire 2?

Spectrum Shift is an uncommon Regent power in Slay the Spire 2. In combat it resolves as: At the start of your turn, add random Colorless cards into your Hand. It’s a dependable, middle-of-the-pack option, landing at C tier in our rankings.

Across 486 recorded runs, decks running it win 31.2% of the time, comfortably clear of the 13.8% average, by 17.4%. It’s a more selective pick, turning up in just 2.3% of decks that could run it. Offer data backs the pick — taken 22.0% of the time it is shown, with 32.5% for runs that took it against 25.9% for runs that did not, a +6.4% pick lift across 341 decided runs. Regent players keep it in 14.3% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.2 times in the decks that take it.

It performs best next to Mad Science — together they post a +29.8% swing in win rate. It also has strong chemistry with the relic Sword of Jade, which moves its win rate by +34.6%. At 2 energy, it’s upgraded in 56.1% of runs and usually joins the deck around floor 15.

Upgraded, it gains -1 EnergyCost, which is why so many decks invest a rest-site upgrade in it. That’s 150 wins, 331 deaths, and 5 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Aeonglass Boss, which closes out 4.3% of its appearances. Read on for Spectrum Shift’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Regent run.

Pick or Skip: Spectrum Shift

Out of 1685 recorded offers Spectrum Shift is taken 22.0% of the time, and taking it is worth +6.4% in pick lift — 32.5% for runs that picked it against 25.9% for runs that skipped, across 341 decided runs.

Taken 370 times out of 1685 offers.

Pick rate when offered counts offers, not runs: out of every time the game put this in front of a player, how often it was taken. It is not the same number as the share of runs that end up containing it.

Pick lift is the sample-adjusted gap between runs that took the option and runs that passed on it. It is the fair way to rank choices, because raw win rates put the smallest samples on top.

When to Pick Up Spectrum Shift

Spectrum Shift is strongest when it joins the deck in Act 3, where runs win 67.3% across 50 runs — one of 3 recorded pickup windows.

Win rate of runs by the act Spectrum Shift entered the deck. Acts that have not reached the sample floor show their run count only.

Best Cards to Pair with Spectrum Shift

Ranked by win-rate lift, Spectrum Shift performs best alongside Mad Science (+29.8%), GUARDS!!! (+22.7%), and Monarch's Gaze (+20.1%).

Mad Science+29.8%41 runsGUARDS!!!+22.7%45 runsMonarch's Gaze+20.1%37 runsBig Bang+19.9%95 runsProphesize+19.2%19 runsBundle of Joy+19.0%58 runs

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

Spectrum Shift Win Rate by Class

Spectrum Shift is drafted only by the Regent, where it holds a 31.1% win rate across 471 runs.

The Regentappears in 14.3% of its runs (471 tracked)

Best Relics for Spectrum Shift

Spectrum Shift pairs best with the relics Sword of Jade (+34.6%), Sturdy Clamp (+32.2%), and Bag of Marbles (+31.3%), ranked by win-rate lift.

Sword of Jade+34.6%16 runsSturdy Clamp+32.2%17 runsBag of Marbles+31.3%68 runsDolly's Mirror+30.8%16 runsMummified Hand+28.6%22 runsPear+27.4%39 runs

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

Spectrum Shift Card Details

Spectrum Shift is an uncommon power costing 2 energy; it’s upgraded in 56.1% of runs and usually picked up by floor 15.

At the start of your turn, add random Colorless cards into your Hand.

Upgrade: -1 EnergyCost

What Ends Runs with Spectrum Shift

Spectrum Shift’s most common run-enders are Aeonglass Boss (4.3%), Knowledge Demon Boss (3.9%), and Queen Boss (3.9%).

• Aeonglass Boss4.3% of runs
• Knowledge Demon Boss3.9% of runs
• Queen Boss3.9% of runs
• Kaiser Crab Boss3.3% of runs
• The Insatiable Boss3.1% of runs

See Also

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