The Chosen Ones

Maybe a effect that have a chance to tigger with each attack, i got some ideas for possible effects:
-Increase attack speed by 60% and deal 400 magical damage over 5 seconds.
-Increase all stats by 30 for 10 seconds(not stackable).
-Make it a orb effect the every attack will deal 30 more damage than the last one :p.
This are my ideas hope they help in anyway  .