All of the magic of the Umineko no Naku Koro ni universe shall be based on the existence of a clear theory and ideas. From this fact, it is one of the elements that are required to the reasoning player explore the identity of what is self-described as magic.
Magic (魔法 Mahō) is a supernatural force that witches, sorcerers and demons use. It also looks like the power to turn the impossible into possible and, in fact, is divided into several compendium of magic, and its effects appears to be different for each system.
- Endless (無限 Mugen) is the title of the compendium of magic used by the Golden and Endless Witches Beatrice, EVA-Beatrice, ANGE-Beatrice and the Endless Sorcerer BATTLER (a time it can also be used by the Witch of Finite Virgilia) and has the power to restore an object endlessly granting the witch/sorcerer the power to kill someone many times by restoring the victim to its previous state.
- Miracle (奇跡 Kiseki) is the title of the compendium of magic used by the Witch of Miracles Bernkastel. It consists in repeating events many times to reach a miracle as result, as long as the probability of this miracle is not a perfect 0%.
- Absolute (絶対 Zettai) is the title of the compendium of magic used by the Witch of Certainty Lambdadelta. It consists in magically rewarding the efforts of someone by bringing absolute results.
- Enchanter (エンチャンター Enchantā) is the title of the compendium of magic used by the Witch of Origins MARIA. It consists in conferring magical properties in objects.
- Origins (起源 Kigen) is the title of the compendium of magic used by the Witch of Origins MARIA. It is a high level magic power that allows to give birth to everything (1) from the Sea of Zero and no matter how many times you multiply zero (0), it doesn't become anything if not zero.
- Resurrection (復活 Fukkatsu) is the title of the compendium of magic used by the Witch of Resurrection ANGE-Beatrice. It is the extraordinary feat of being able to bring back to life anything destroyed through their remains regardless of whether their existence has been denied or not.
- Truth (真実 Shinjitsu) It is a type of magical power that can be used by any witch, sorcerer and, to a limited extent, even the "pieces" of the various games. Some witches, however, who choose to specialize in this type of magic as ANGE-Beatrice and Erika Furudo are being defined Witches of Truth.