This spell allows the priest to ignore hunger, thirst, and extremes of climate
for an extended period of time. While the spell is in effect, the priest
requires no food or drink. He is effectively immune to exposure, dehydration, and
heat or cold injury, since no naturally occurring climatic condition will cause
him harm. (Lightning, floods, tornadoes, earthquakes, and other such hazardous
phenomena can still cause physical injury, of course.)
During the iron vigil, the priest is able to ignore the need to sleep by choosing to meditate
instead. While meditating, the priest can keep watch on his surroundings, but he
suffers a +1 penalty to any surprise checks. If the character wishes to memorize
spells, he must sleep normally.
At the vigil’s end, the priest must eat and drink; if no food or water is
available, the character must make a Constitution check once every four hours at a
cumulative –1 penalty or fall into a coma and perish within 1d3 days if he
receives no aid. He also requires at least four hours of rest for each day that he
did not eat, drink, or sleep during his vigil.
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