A new icon more fitting for the Shimmerweed model. In my map I use it as an ability for the Dryad: grows a plant over 12 seconds that can later be picked up as an item (units can use up to two items, elites can use four items).

Verdant Gift:
+1 Life Regen

Active: use to instantly heal for 50 + 10% of your missing life.
120 seconds cooldown.

Passive: whenever the wearer is under an overtime damage effect it will regenerate 1 + 1% of its missing life each second.