"Lock and Load re-designed: You now have a 33/66/100% chance when you trap a target with Freezing Trap, Freezing Arrow or Frost Trap and a 2/4/6% chance when you deal periodic damage with your Immolation Trap or [size=10pt]Black Arrow[/size] to cause your next 2 Arcane Shot or Explosive Shot spells to trigger no cooldown, cost no mana and consume no ammo. This now has a new spell effect and sound"
Any thoughts of what this might be?