Maqlu is not a spell but a programme, and its shape is the most informative thing about it. Eight tablets carry the incantations in sequence. A ninth carries the ritual instructions that go with them, keyed to the incantations by their opening words, which is how Mesopotamian scholars cross-referenced. The whole runs through a single night and finishes in the morning, and the sequence of the night is legible in the text: the powers addressed at the start are those of the night sky, and the closing material belongs to sunrise.
The situation it assumes is specific. A man is ill, or unlucky, or estranged from his household and his god, and no ordinary cause accounts for it. The diagnosis is that a witch has acted against him. The exorcist, the ashipu, then conducts what reads as a legal proceeding: the witch is summoned, denounced before the gods, tried and sentenced, and the sentence is carried out on figurines that stand for her, which are burned. Girra, the fire, and Nusku, the lamp, are the powers that do the work.
What makes the series valuable to historians is that the legal framing is not decoration. Mesopotamian law took witchcraft accusations seriously enough to legislate for them, and the ritual borrows the procedure of a court because that is how a wrong was understood to be righted. The exorcist is not overpowering the witch. He is prosecuting her before gods who are expected to give judgement, and the destruction of the figurines is an execution of a sentence rather than an assault.