D: [dice] hours

All iterations of [animal] should be replaced by a specific animal species when the spell is first found.

You summon [dice] HD worth of [animal], or a [sum] HP swarm if they are 0HD creatures. They arrive after 10 minutes from somewhere behind you. You can direct their actions.

If you invest 4 dice or more in this spell, the effect becomes permanent and they become part of your entourage.

[Animal] + Call

Adapted from Marvels & Malisons