While above 70% health and in combat, you enter a Dreaming Trance and gain 0.0106 × SP Critical Strike. The trance will deepen every second and grant another stack, up to the maximum stack count.
If you drop below 70% health, a burst of Dreamtender's Pollen will slow nearby enemies by 20% for 5 sec and prevent Dreaming Trance for 30 sec. Dreaming Trance will linger for 1 sec per Ysemerald you have socketed into your gear.