Druid · Balance · tier 2 · from level 15

Moonglow

+61.0 Entangling Roots

3/3 · level 60 · per 100 mana · and 5 more

Moonglow 123

Rank 3/3

Reduces the Mana cost of your damaging spells by 25%.

Entangling Roots +33.3% +61.0 Insect Swarm +33.3% +37.9 Starfire +33.3% +36.5 Moonfire +33.3% +33.0 Hurricane +33.3% +28.8 Wrath +33.3% +26.3

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.