Planetars are a bit stronger than Devas. They have the Silver sword and 3 attacks per round, as opposed to the Deva's Mace of Disruption + 2 and 2 attacks per round. Planetars can also cast Heal and Lesser Restoration. Plus, Planetars can cast mage spells and Earthquake, Firestorm, and Symbol spells.
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"This place will be your tomb."