You infuse your weapon with magical Light that is released when you hit your next enemy. The Light blinds the enemy that is hit aswell as all characters adjacent to you. Those affected by Blinding Strike's Blinding effect are blind for 1 turn.
If you did not hit with an attack enchanted by Blinding Strike you may cast it again at the start of your next turn without spending a Spell Slot or Action. If you're a Bard you may have Blinding Strike enchant your weapon for any amount of turns but you can't sing any songs or cast spells that need a Verbal component whilst Blinding Strike affects your weapon. You may have Blinding Strike's Blinding Effect last for 1 more turn if you blind yourself for 1 turn.