Lightning Helm

Power (Daily): Free Action. Use this power when you make an opportunity attack. Make two melee basic attacks instead of one. Each attack gets additional 1d8 lightning damage and you gain +2 damage till the end of your next turn.

Lightning Boots

Property: Gain a +2 item bonus to Acrobatics and Athletics checks.
Power (Encounter): Move Action. Move up to your speed + 1. Gain a +2 item bonus to AC against opportunity attacks during this movement.