Dive (m). When making a melee attack, the harpy can swoop down at a foe and make the melee attack before swooping up again. This works like a Charge (cost 2d6, +1d6 damage), but carries the harpy onwards afterwards. This attack knocks the target prone.
Snatch (m). Instead of attacking a foe, a harpy can attempt to snatch an object with a Dive. The harpy makes an AGI (thievery) check (7d6) vs. the target's MELEE DEFENSE, and if successful carries away a medium sized or smaller object.