Zyra passive idea
Rise of the thorns
After damaging a champion with an ability Zyra gains 1 stack of "thorns" up to 3. If she has available stacks, the basic attacks of Zyra and her plants consume them (one at a time) to deal 20/30/40/50 (+.1 AP) bonus true damage to both it and anything the projectile passes through. (the closest analogy is Riven passive)
Also
W will now prioritize champions if they are in range. Does not take an excessively long time to switch targets, as is sometimes the case.
