Lash's Ground Strike will cause knocked up enemies that get hit by it (who are knocked up but close to the ground) to get stuck in the slam's anti-flyer hitbox and not land until the duration of the knock up ends. This time seems irrespective of ability duration. It can only be triggered by slamming close to someone, and the easiest way to trigger it is by using Echo Shard to knock your enemy up with the first slam and hit them with the second to stick them.
Enemies that are stuck in Ground Strike will follow the player's direction of movement and are unactionable while stuck, allowing Lash to either displace them or deal free damage. Lash can also target abilities and actives on the enemy during the time they're stuck, effectively allowing a free grapple use or extra stun. Enemies will be dragged with Lash no matter the speed he moves at, so doing things like using Majestic Leap or Melee Cancelling will allow large displacement distance.
Enemies that are stuck in Ground Strike will follow the player's direction of movement and are unactionable while stuck, allowing Lash to either displace them or deal free damage. Lash can also target abilities and actives on the enemy during the time they're stuck, effectively allowing a free grapple use or extra stun. Enemies will be dragged with Lash no matter the speed he moves at, so doing things like using Majestic Leap or Melee Cancelling will allow large displacement distance.