Bundle of Joy•Skill

Is Bundle of Joy good in Slay the Spire 2?

In Slay the Spire 2, Bundle of Joy is a rare skill from the Regent card pool. Its effect: Add random Colorless cards into your Hand. 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 103 tracked runs its win rate sits at 34.0%, 19.8% ahead of the 14.1% all-deck baseline. It sees niche play, included in only 1.0% of eligible runs. When it is actually offered players take it 22.8% of the time, and that looks correct: those runs win 44.0% against 35.6% for runs that passed, a +7.4% pick lift over 75 decided runs. Within Regent runs it’s drafted 5.3% 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 Dying Star, which lifts its win rate by +21.0% when the two share a deck. On the relic side, Pendulum is its standout companion, worth a +24.0% win-rate swing alongside it. It costs 1 energy, gets upgraded 29.3% of the time, and tends to be picked up near floor 16.

Upgrading the card adds +1 Cards to its stat line. Of the runs that drafted it, 35 ended in victory against 68 deaths and 0 abandons. Its most common run-ender is Entomancer Elite, finishing 4.9% of the runs it shows up in. See the synergies, class split, and threats below for the full picture of where Bundle of Joy fits a Regent deck.

Pick or Skip: Bundle of Joy

Players take Bundle of Joy in 22.8% of the 347 offers it appears in; those runs win 44.0% against 35.6% for runs that passed, a pick lift of +7.4% over 75 decided runs.

Taken 79 times out of 347 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 Bundle of Joy

Of the 4 pickup windows recorded for Bundle of Joy, Act 2 is the best: 53.6% across 28 runs.

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

Best Cards to Pair with Bundle of Joy

Bundle of Joy’s strongest card pairings so far are Dying Star (+21.0%), Stardust (+19.4%), and Big Bang (+17.4%), each shown with the win-rate lift it adds.

Dying Star+21.0%18 runsStardust+19.4%17 runsBig Bang+17.4%20 runsRoyal Gamble+15.7%23 runsQuasar+15.7%21 runsGamma Blast+14.1%22 runs

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

Bundle of Joy Win Rate by Class

Exclusive to the Regent, Bundle of Joy posts a 32.6% win rate over 98 tracked runs.

The Regentappears in 5.3% of its runs (98 tracked)

Best Relics for Bundle of Joy

The relics that swing Bundle of Joy’s win rate the most are Pendulum (+24.0%), Gorget (+24.0%), and Lantern (+23.6%), with each lift shown.

Pendulum+24.0%20 runsGorget+24.0%20 runsLantern+23.6%15 runsBag of Preparation+21.0%18 runsTuning Fork+19.6%15 runsAnchor+19.4%17 runs

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

Bundle of Joy Card Details

A 1-energy rare skill, Bundle of Joy is upgraded 29.3% of the time and tends to enter the deck around floor 16.

Add random Colorless cards into your Hand.

Upgrade: +1 Cards

What Ends Runs with Bundle of Joy

Runs holding Bundle of Joy end most often against Entomancer Elite (4.9%), Infested Prisms Elite (3.9%), and Decimillipede Elite (2.9%) — the share of its runs each accounts for is shown.

• Entomancer Elite4.9% of runs
• Infested Prisms Elite3.9% of runs
• Decimillipede Elite2.9% of runs
• Knowledge Demon Boss2.9% of runs
• Bowlbugs Normal2.9% of runs

See Also

Keep exploring Slay the Spire 2 tier lists and stats below.