Up to 1 minute
You create a 40-foot cube where a gentle, warm wind blows in from the south. Allied creatures in the breeze may spend a hit die as a free action once per turn to heal themselves. The breeze suppresses stronger wind effects in the area for the duration, whether natural or magical, if the winds do not originate from a spell of higher level.
When you cast this spell using a spell slot of 5th level or higher, the amount of healing your allies receive per hit die spent increases by +3 for every slot level above 4th.