'''Regulus''' (王の光 ''Regurusu'') is a Holder Type Magic utilized by Celestial Spirit, Loke.
LokeusestheLight,Lion Magic Regulus, which isactivatedbyhisring,embeddedwithaMagicalquartz.HisMagic has been seen to havesomerangedmoves, thoughany physical rangedmoveshaveyet to beconfirmed.ThispowersupallofLoke'sattackswithlightMagicclaws, makinghimable to slashorpunchanenemywithmuchmorepower.WhilehispowerswerelimitedduringhisexilefromtheCelestialSpiritworld, hehasbecomeconsiderablystrongerthanBickslowanticipatessincehehasbeenallowedtoreturn, since his powershaverecovered. Heislikelytobeoneof, ifnot the strongestZodiacCelestialSpirits.
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Regulus is a type of Magic which allows its users to produce the element of light from their body. Regulus has mainly been seen used to boost the users' melee performance, empowering their physical attacks with wakes of destructive light, which are produced from their unarmed blows in a fashion similar to a lion clawing at its prey. Light can also be employed in other ways, with the user being capable of emitting it in vast amounts, enough to cover a wide area, and of shaping it into various forms. To activate such power, Loke was initially shown bending his right arm, with the clenched fist pointed towards the sky, and grabbing his bicep with his left hand, before chanting out "O Regulus... Grant me your strength!". Later on, he is only shown taking on the stance without actually chanting the incantation.