Version

Prowess

ColorlessPowerUncommon
Gain 1 Strength.
Gain 1 Dexterity.

One Energy for a permanent point of Strength and a point of Dexterity. Strength adds 1 to every hit of every attack for the rest of the fight; Dexterity adds 1 to every Block a card gives. Upgraded it grants 2 of each, which doubles its value for the same cost.

Pool
Colorless
Type
Power
Rarity
Uncommon
Cost
1 Energy
Target
Yourself
Unlock
TraitorsFill the score bar at the end of a run

When to take Prowess

A quiet, solid Act 1 pickup for any character, best with many cheap attacks and Defends. Grab it from a shop over a card reward, and upgrade early.

Cards that synergize with Prowess

Ricochet
Attack
2
Sly.
Deal 3 damage to a random enemy 4 times.
Ricochet and Conflagration get the Strength bonus on every one of their hits.Sly.
Deal 3 damage to a random enemy 4 times.
Conflagration
Attack
1
Deal 2 damage to ALL enemies 4 times.
Ricochet and Conflagration get the Strength bonus on every one of their hits.Deal 2 damage to ALL enemies 4 times.
Fasten
Power
1
Gain an additional 4 Block from Defend cards.
Fasten alongside it makes each Defend a real wall.Gain an additional 4 Block from Defend cards.
Volley
Attack
X
Deal 10 damage to a random enemy X times.
Volley hits several times, so the Strength from Prowess counts on each hitDeal 10 damage to a random enemy X times.
Seven Stars
Attack
2
7
Deal 7 damage to ALL enemies 7 times.
Seven Stars hits several times, so the Strength from Prowess counts on each hitDeal 7 damage to ALL enemies 7 times.
Exterminate
Attack
1
Deal 3 damage to ALL enemies 4 times.
Exterminate hits several times, so the Strength from Prowess counts on each hitDeal 3 damage to ALL enemies 4 times.
Celestial Might
Attack
2
Deal 6 damage 3 times.
Celestial Might hits several times, so the Strength from Prowess counts on each hitDeal 6 damage 3 times.
Eradicate
Attack
X
Retain.
Deal 11 damage X times.
Eradicate hits several times, so the Strength from Prowess counts on each hitRetain.
Deal 11 damage X times.
Gunk Up
Attack
1
Deal 4 damage 3 times.
Add a Slimed into your Discard Pile.
Gunk Up hits several times, so the Strength from Prowess counts on each hitDeal 4 damage 3 times.
Add a Slimed into your Discard Pile.
Heavenly Drill
Attack
X
Deal 8 damage X times.
Double X if it's 4 or more.
Heavenly Drill hits several times, so the Strength from Prowess counts on each hitDeal 8 damage X times.
Double X if it's 4 or more.
Peck
Attack
1
Deal 2 damage 3 times.
Peck hits several times, so the Strength from Prowess counts on each hitDeal 2 damage 3 times.
Skewer
Attack
X
Deal 8 damage X times.
Skewer hits several times, so the Strength from Prowess counts on each hitDeal 8 damage X times.
Stardust
Attack
0
Deal 5 damage to a random enemy X times.
Stardust hits several times, so the Strength from Prowess counts on each hitDeal 5 damage to a random enemy X times.
Sword Boomerang
Attack
1
Deal 3 damage to a random enemy 3 times.
Sword Boomerang hits several times, so the Strength from Prowess counts on each hitDeal 3 damage to a random enemy 3 times.
Whirlwind
Attack
X
Deal 5 damage to ALL enemies X times.
Whirlwind hits several times, so the Strength from Prowess counts on each hitDeal 5 damage to ALL enemies X times.
Astral Pulse
Attack
0
3
Deal 6 damage to ALL enemies twice.
Astral Pulse hits several times, so the Strength from Prowess counts on each hitDeal 6 damage to ALL enemies twice.
Barrage
Attack
1
Deal 5 damage for each Channeled Orb.
Barrage hits several times, so the Strength from Prowess counts on each hitDeal 5 damage for each Channeled Orb.
Dagger Spray
Attack
1
Deal 4 damage to ALL enemies twice.
Dagger Spray hits several times, so the Strength from Prowess counts on each hitDeal 4 damage to ALL enemies twice.
Dismantle
Attack
1
Deal 8 damage.
If the enemy is Vulnerable, hits twice.
Dismantle hits several times, so the Strength from Prowess counts on each hitDeal 8 damage.
If the enemy is Vulnerable, hits twice.
Fight Me!
Attack
2
Deal 5 damage twice.
Gain 3 Strength.
The enemy gains 1 Strength.
Fight Me! hits several times, so the Strength from Prowess counts on each hitDeal 5 damage twice.
Gain 3 Strength.
The enemy gains 1 Strength.
Finisher
Attack
1
Deal 6 damage for each Attack already played this turn.
Finisher hits several times, so the Strength from Prowess counts on each hitDeal 6 damage for each Attack already played this turn.
Flak Cannon
Attack
2
Exhaust ALL your Status cards.
Deal 8 damage to a random enemy for each card Exhausted.
Flak Cannon hits several times, so the Strength from Prowess counts on each hitExhaust ALL your Status cards.
Deal 8 damage to a random enemy for each card Exhausted.
Flechettes
Attack
1
Deal 5 damage for each Skill in your Hand.
Flechettes hits several times, so the Strength from Prowess counts on each hitDeal 5 damage for each Skill in your Hand.
Helix Drill
Attack
0
Deal 3 damage for each previously spent this turn.
Helix Drill hits several times, so the Strength from Prowess counts on each hitDeal 3 damage for each previously spent this turn.

Relics that synergize with Prowess

Frozen Egg
Frozen Egg hands you the upgraded version for free.Whenever you add a Power into your Deck, Upgrade it.
Ruined Helmet
Ruined Helmet doubles the first Strength gain of a combat.The first time you gain Strength each combat, double the amount gained.
Game Piece
Game Piece and Mummified Hand pay you for playing a Power.Whenever you play a Power, draw 1 card.
Mummified Hand
Game Piece and Mummified Hand pay you for playing a Power.Whenever you play a Power, a random card in your Hand is free to play that turn.
Permafrost
Permafrost triggers on Powers played, and Prowess is oneThe first time you play a Power each combat, gain 7 Block.
Lost Wisp
Lost Wisp triggers on Powers played, and Prowess is oneWhenever you play a Power, deal 8 damage to ALL enemies.
✦
Coordinate
Skill
1
Give another player 5 Strength this turn.
Dark Shackles
Skill
0
Enemy loses 9 Strength this turn.
Exhaust.
Bulk Up
Power
2
Lose 1 Orb Slot.
Gain 2 Strength.
Gain 2 Dexterity.
Footwork
Power
1
Gain 2 Dexterity.
Inflame
Power
1
Gain 2 Strength.
Rupture
Power
1
Whenever you lose HP on your turn, gain 1 Strength.
Arsenal
Power
1
Whenever you create a card, gain 1 Strength.
Abrasive
Power
3
Sly.
Gain 1 Dexterity.
Gain 4 Thorns.

Changes by version

  1. 18 Sep 2025RarityRareUncommonInternal playtest
    Rarity changed from Rare to Uncommon
  2. 10 Jul 2025ArtInternal playtest
    Added card art
  3. 6 Feb 2025AddedInternal playtest
    Added to the game

Internal playtest notes are from before the Early Access release. Names and numbers in them can differ from the game today.

Purchase today
If you haven't bought Slay The Spire 2 yet, it's time. Support the devs, they made an amazing game.Get it on Steam