Druid · Balance · tier 3 · from level 20
Improved Entangling Roots
+171 Entangling Roots
3/3 · level 60 · per cast
Improved Entangling Roots
Rank 3/3
Increases the damage done by your Entangling Roots spell by 75%, and its victims can take up to 75% more damage without interrupting the effect.
Averages, counting crits and misses, for a level 60 Druid with a typical weapon and no other gear or buffs, against a target your level. Worked out from the game's own data, the same way as the Foresight addon.