Druid · Balance · tier 5 · from level 30
Nature's Grace
+3.6 Regrowth
1/1 · level 60 · per second of casting · estimate: you cast nonstop · and 3 more
Nature's Grace
Rank 1/1
All non-periodic spell criticals grace you with a blessing of nature, increasing your spellcasting speed and reducing your global cooldown by 10% for 3 sec.
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.