All the physical processes of a character are sent into overdrive for a short period of time, delivering huge benefits in terms of speed and ability to act. There is a significant cost, however, and the body requires time to recover from the massive exertion.
Double movement speed and number of all actions available per turn, add Earth and Air modifier to Defense (if one already is added to Defense, add the other), and ADV on all Earth and Air saving throws and ability checks requiring movement.
Once the effects have worn off, Add 2 to Fatigue severity (e.g. no Fatigue becomes Fatigue II, etc.) after the effects wear off. Fatigue from Haste does not reduce during Recovery, only from Rest.
Haste: Earth 4, Air 4