The First Eidolon's Soulsteel

2 pieces: (2) Set: While your Dancing Rune Weapon is active Heart Strike extends the duration of Dancing Rune Weapon by 0.5 seconds and increases your Strength by 1%, persisting for 10 seconds after Dancing Rune Weapon ends.

4 pieces: (4) Set: When you take damage, you have a chance equal to 100% of your Parry chance to lash out, Heart Striking your attacker. Dancing Rune Weapon now summons 2 Rune Weapons.