Sword Boomerang

Sword Boomerang is a 1-Energy Ironclad attack that hits a random enemy 3 times for 3 damage each (4 times upgraded), totaling 9 damage (12 upgraded). The multi-hit nature makes it one of the best Strength-scaling attacks for its cost — each hit applies Strength separately, so 5 Strength means 5 extra damage per hit, adding 15 bonus damage for 3 hits or 20 for 4. It also procs on-hit relics and effects multiple times per play.

The random targeting can be a downside in multi-enemy fights if you need to focus fire on a specific target, but in single-enemy encounters it reliably delivers all hits to the same target. In Strength-stacking builds, Sword Boomerang becomes one of the most efficient damage dealers in the deck. Worth picking up in most runs, especially with any Strength generation.