Suppose there's a necromancer who usually raises their dead from a cemetery or similar. Suppose that this necromancer decides to go on a holiday/vacation with their significant other and isn't around a bunch of dead bodies. Suppose that this necromancer gets attacked and needs to defend themself and their significant other.
Are there any items that allow necromancers to use their control undead ability without the convenience of dead bodies at hand? (Presumably they could carry a dead rat on their belt at all times, and animate that. Undead rats don't tend to be great at defending humans, however, and carrying dead humanoids around is rather unwieldy.)