Why Pick ItBuffer buys whole turns, which is why it is far stronger than a simple prevent-one-hit text makes it sound. Take it in boss fights and setup-heavy Defect decks where surviving one key turn is worth more than another generic block card. Best homes include Echo Form, Biased Cognition, big setup turns, and any deck that needs one protected window before the engine takes over. When that support already exists, Buffer stops being theoretical upside and starts changing the next few fights immediately.
Why Skip ItSkip it in fast hallway decks that cannot afford another slow power and already defend cleanly through cheaper cards. It is less exciting in decks that already solve fights through immediate Frost density or fast frontload instead of delayed setup. Buffer drops fast once the run no longer needs the exact job it was drafted to solve, which is where a premium-looking text box turns into dead weight.
BreakpointPreventing two hits on upgrade is a major breakpoint because the card stops being a one-turn patch and starts covering a full danger window. That breakpoint only matters if it changes smith priority, turn sequencing, or the damage math you expect to face next. If that shift is not changing a real decision right now, the premium story is mostly cosmetic.
Best ShellsThe clean homes are Echo Form, Biased Cognition, big setup turns, and any deck that needs one protected window before the engine takes over. Buffer wants a shell that can cash the upside on the same turn or the same cycle it matters. Those decks convert the text into tempo, stability, or a faster kill clock instead of waiting several fights for the promise to come true.
Bad ShellsIt is less exciting in decks that already solve fights through immediate Frost density or fast frontload instead of delayed setup. Those are the shells that make Buffer look stronger in draft than it feels in play. Buffer either arrives too early, lands too late, or asks for support the run never actually built.
Route ContextRoute context matters because Buffer is only premium when it fixes the next failure point instead of adding one more nice idea to a deck that already has too many ideas. The next check is Open Defect Guide. See whether Buffer is covering a real setup weakness or merely duplicating defense you already have. If the call is still close after that, use Check Rest Site Optimizer. Compare the Buffer smith against upgrades that provide a more immediate defensive swing. If the next rooms are asking a different question, verify the line before you spend draft equity, a smith, or route safety on it.
Example LineTake it in boss fights and setup-heavy Defect decks where surviving one key turn is worth more than another generic block card. The support package already includes Echo Form, Biased Cognition, big setup turns, and any deck that needs one protected window before the engine takes over. Preventing two hits on upgrade is a major breakpoint because the card stops being a one-turn patch and starts covering a full danger window. That is the version of the run where Buffer stops being speculative and starts changing what you can safely do in the next room or at the next campfire.
Common MisreadThe usual mistake is reading the ceiling and ignoring the shell. Skip it in fast hallway decks that cannot afford another slow power and already defend cleanly through cheaper cards. It is less exciting in decks that already solve fights through immediate Frost density or fast frontload instead of delayed setup. Buffer gets overrated when players remember the best-case output but forget how rarely the current deck actually produces that state.
