If the the chance to do critical damage has been decreased to 25%, if the next attack is not critical will the buff be lost or remain until next crit ? —The preceding unsigned comment was added by DarckArchon (talk · contr).

From the text and wowhead comments, it sounds like many other "next attack"-type modifiers, meaning the extra crit chance goes away after the next Slam/Mortal Strike, regardless of whether it crits, hits, misses, is blocked, etc. -- Harveydrone 16:42, 2 June 2009 (UTC)