The character can place another spell upon the character's
person so that the latter spell comes into effect under some
condition the character dictates when casting contingency. The
companion spell and the spell it is to bring into effect are cast
at the same time. The 10-minute casting time is the minimum total
for both castings; if the companion spell has a casting time
longer than 10 minutes, use that casting time instead.
The spell to be brought into effect by the contingency must be
one that affects the character's person (feather fall, levitate,
fly, teleport, and so forth) and be of a spell level no higher
than one-third the character's caster level (rounded down,
maximum 6th level).
The conditions needed to bring the spell into effect must be
clear, although they can be general. In all cases, the
contingency immediately brings into effect the second spell, the
latter being "cast" instantaneously when the prescribed
circumstances occur. Note that if complicated or convoluted
conditions are prescribed, the whole spell combination
(contingency and the companion magic) may fail when called on.
The companion spell occurs based solely on the stated conditions,
regardless of whether the character wants it to.
The character can use only one contingency spell at a time; if
a second is cast, the first one (if still active) is dispelled.