Mordenkainen's Celerity

Mordenkainen's celerity affects spells of levels 1-3 which alter the movement of the wizard such as Feather Fall, Jump, Spider Climb, Levitate, Fly, and Haste. Spells to be affected must be cast within 1 turn of the casting of the celerity. Spells do not expire when the celerity expires.
Spells cast following the celerity receive a 25% bonus to duration. This effect may not be gained in conjunction with other means of magically extending a spell's duration. In addition, the caster's movement rate is increased by 25%. Feather fall is an exception; the rate of descent may be reduced by 25% at the caster's option.
The area of effect is always the caster, except in the case of the haste spell, for which the effects of the celerity will operate on 1d4 creatures in addition to the wizard. The celerity will not affect the other creatures in any other manner.
The celerity gives the wizard a +2 bonus to his saving throws against spells of levels 1-3 which directly affect his movement. This includes Web, hold person, and @slow. The wizard also gains a +2 bonus on all saving throws against magical paralysis attacks.

[Tome of Magic]

School: Alteration, Invocation/Evocation
Level: 4
Rarity: Rare

Range: 0
Components: V, S, M
Duration: 1 turn
Casting Time: 4
Area of Effect: Special
Saving Throw: None

Material Components:
a small pouch or vessel containing centipede or millipede legs