As with all Beast weapons; there are a number of aspects to Heron Wing. At the start of turn; it restores 7 HP to all allies within 2 spaces of the Heron, and also boosts their Speed by 3. In addition; it has the standard Beast transformation effect of Attack +2 and an extra space of movement range while in Beast form.
Grants Spd+3. At start of turn, restores 7 HP to allies within 2 spaces of unit. At start of turn, if unit is adjacent to only beast or dragon allies or if unit is not adjacent to any ally, unit transforms (otherwise, unit reverts). If unit transforms, unit can move 1 extra space. (That turn only. Does not stack.) If unit transforms, grants Atk+2.