Ice Magic (Wizard Spell)

Ice magic is a special spell that allows the caster to shape ice and snow, to fortify current ice-based spells, or to control ice-related creatures within the caster's range. The caster must choose how they wish to use it, with the following effects: 
1. To shape ice: The caster can shape existing ice into bridges, ladders, and the like, up to one 10' x 10' square per level. If there is enough ice on the ground, they can choose to create jags of ice with the same damaging effects as the spike stones spell, while large ice stalactites on the ceiling could be formed that would cause 1-8 HP damage each (no more than one large ice “stalactite” per three experience levels). The effects last 1 turn per level.
2. To fortify ice and cold spells: The duration of all such spells (such as wall of ice) can be doubled, except for those with instantaneous effects. Ice spells that cause damage are deadlier (+1 HP damage per hit die of damage). The spell must be cast 3 rounds before the spell to be fortified is cast.
3. To control ice creatures: Beings from the para-elemental plane of ice can be dominated by the caster (as the 5th level wizard spell), one target per round. Once one being fails its save, it serves the caster unquestioningly until he chooses to dominate some other such creature. This lasts for 1 round per level. 
The material component of this spell is ice, which is required for all castings except when the second option is chosen (some spells to be fortified are instantaneous, so they cannot be cast beforehand).