Unlike a normal battle, the Ancient One cannot be
defeated in a single attack. Instead, keep track of every
success an investigator scores against the Ancient One
(see “Skill Checks,” page 13). These successes are
cumulative, and each successive player adds to them
with his own attack. When the players accumulate a
total number of successes equal to the number of players
(including any players that were eliminated from the
game), remove one doom token from the Ancient One’s
doom track and reset their cumulative successes to zero.
If the last doom token is removed from the Ancient One,
the investigators have defeated it! See “Ending the
Game” on page 12.