Rain of Fire

Area
Fiery droplets rain from the sky onto the area of effect, causing 1d-1 fire
damage per second to all within it. Creatures under the Rain of Fire take
damage on their own turns; if less than an entire second is spent in the affected
area, damage is halved (round down).
The spell can only be cast outdoors. Armor protects in the usual
fashion. A shield with a DB of 2 or better can be held overhead to block the
flames, but it may take damage (p. B484). This requires two hands
and a Ready action, and succeeds automatically in protecting the char-
acter once the shield is readied upwards, but this unreadies the shield
from its normal protective functions!
Inanimate objects such as buildings protect with their DR, but some
structures (see HP and DR of Structures, p. B558) may be damaged or catch fire.

Duration: 1 minute.
Base cost: 1 to cast (minimum 2). Same cost to maintain. For double
base cost, the Rain of Fire does 2d-2 per second!
Time to cast: One minute.
Prerequisites: Magery 2 and Create Fire.

Item
Staff. Usable only by mages.
Energy cost to create: 600.