Brine Siphoner

Exhaust it to use it. You keep this steam until the end of the phase; it pays your costs first. What you don't spend by then is lost. Then: Your opponent puts the top 2 cards of their hold into their scrapyard. Only in your own watch, with the crossfire empty; it resolves at once. Not in the turn it came on board during a watch, unless it has Quickstart.