Skyhook

With this spell, the mage creates a solid hook of force invisible to all but the caster at a desired location. The hook need not be attached to anything, and indeed is usually created in midair over a pit or chasm, but it remains absolutely immobile. Creatures can hang on to it, ropes be tied to or hooked over it, and so on. It supports up to 30 tons of weight.

If the weight limit is exceeded, the skyhook instantly vanishes. Otherwise, it lasts until the spell expires, fading out of the caster's view as a warning of its impending expiration in the final two rounds of its existence. It is too small to be stood upon (for example, to climb further, or cast spells or fire missile weapons from), but its hook is large enough to permit thick cables and many grasping hands to find purchase. A skyhook, once created, cannot move. Ropes and other things secured to it appear to creatures other than the caster to be tied to nothing. The skyhook is solid enough to harm creatures flying into it or striking it but cannot itself be physically harmed, and, aside from limited wish and more powerful magic of the same sort, it can only be affected by a disintegrate spell.

The caster of a skyhook can will it out of existence instantly. The material component of this spell is a miniature metal fishhook.