Nunchaku

Nunchaku is an Uncommon relic in Slay the Spire 2 that grants 1 Energy every time you play 10 Attacks. The counter persists between combats, meaning partially charged progress from one fight carries over to the next, and the bonus Energy can arrive at a critical moment mid-fight.

While 10 Attacks may sound like a lot, most fights involve playing several Attacks per turn. In an average combat, you will trigger Nunchaku at least once, and in longer fights or Attack-heavy decks, you may trigger it multiple times. The bonus Energy arrives mid-turn, allowing you to play an additional card at a moment when you have already seen your hand and can make optimal use of it.

Nunchaku is best in decks that play many cheap Attacks, such as Shiv-based Silent builds or Ironclad decks focused on Strikes and multi-hit cards. It synergizes with Ornamental Fan and other relics that track Attack plays, creating a package of rewards for aggressive play patterns. The relic is weaker in Skill-heavy or Power-focused builds that play few Attacks per turn. For Attack-centric strategies, Nunchaku provides reliable supplemental Energy that scales with your natural play pattern.