Battlefield Medic

{g}Self - Replace this unit with a Rank 1 Unit from
your Discharge.
{g}Self - If this Unit is in your Front Row, you may
Promote it by playing a Rank 2 Unit on it from
your Discharge.
{g}Self - If this Unit is in your opponent's Front
Row, you may Promote it by playing a Rank 3
Unit on it from your Discharge.