Board Thread:Homebrew/@comment-30996754-20170206063825/@comment-454133-20170228161452

At a minimum it needs to be single-use (or roll a die for it to collapse after every use). Also probably deal hull damage to the ship from the force of the awkward jump, e.g. half their hull rounded up (so it might destroy a damaged ship).

To explain the reason why: as written it's trivially abusable. Just start your ships facing the table edge, and by the first combat phase of the game you could teleport across the map and focus-fire one enemy ship. And for 3 points you can fly extremely recklessly near the table edge because you face almost no penalty for doing so (while normally the obstacle-light table edge is one of the most dangerous places).

The first rule of homebrew is "limit it good". :)  Things that are not limited enough become insanely powerful, but with the right restrictions and limits to their power, they can become very appropriate.  Think in terms of Stealth Device or Cloaking Device, which you can lose fairly trivially; without that limit, they're ridiculously powerful.