User can turn into a train

Pros:
-user can do this to any size
-user can make skin iron
-user can travel without tracks
-user can make feet wheels to travel quickly
-user can make eyes lights
-user can expand body mass

Cons:
-user may find bigger/small trains harder
-user can't always do this
-user powers themselves

Weakness: blockades
User can't quickly put on breaks and will harm someone