All sorcerers receive the Eschew
Materials feat as a bonus feat at first level. Multi-class
sorcerers cannot apply this bonus feat to any non-sorcerer spells.
Sorcerers may attempt to channel additional spell energy beyond what
they may normally handle in a day, but at great personal risk,
essentially burning themselves out. A sorcerer may attempt to
cast a spell for which he does not have any remaining spell slots of
the appropriate level with a concentration check (DC 20 + spell
level). If the character succeeds at the concentration check, the
spell is cast as normal, immediately after which the character takes
lethal and nonlethal damage equal to the level of the spell cast.
Note that casting spells such as False
Life in this manner apply their effects after the character
takes the damage.