"Lower row" would probably work.
What I pictured was that from the user's perspective, the target creature would move to the row that's the next closer. So if you used it, the opponent's lower row would move to his/her central row, then to his/her higher row, and if you used it on your own creature it would move first from your higher row, to your central row, to your lower row. EtG doesn't seem to have a direction or terminology for that direction, though.