If the Boss has four or more Boss Counters and has taken at least ten damage, it gains X health where X is twice the amount of Boss Counters it has. Then remove all Boss Counters.
Otherwise, it gains X Boss Counters where X is the number of players + 1. Then, put X Minions from the top of the Minion Oblivion into play.
Each player puts a Doubt on target non-token Clash card they control.