As an extra cost, exhaust a Mercenary in your berth.
Destroy target engine.
Resurface . A resurfaced Sabotage! is removed from the game after it resolves.
Explained
As an extra cost, exhaust a Mercenary in your berth.306.5
Besides the steam, you exhaust one of your Mercenaries that isn't dispatched when you deploy it. It stays exhausted until your next stoke phase. A crew that came on board this turn can pay it too (306.5).
Destroy target engine.801.9e
Choose an engine on board when you deploy it, either player's. It stops existing: engines aren't deck cards, so there is no scrapyard for it. If it has left the board by the time this resolves, nothing happens (801.9e).
Resurface . A resurfaced Sabotage! is removed from the game after it resolves.802.3d
While it is in your scrapyard, you may deploy it from there for this cost instead of its own, whenever you could deploy it from your hand. It goes into the crossfire, and the opponent may react. Deployed from your hand, it goes to the scrapyard as usual, so it can be used again this way.