Magic Jamming

Magic Jamming (魔力妨害) is an Extra Skill used by Charybdis and its accompanying Megalodons. It also an Intrinsic Skill possessed by Harpies.

Abilities
It allows the user to disturbs the flow of Magicules making the user strongly resistant to Magic and disturbs any external uses of Magicules.

Harpies used it to negate the flying ability of others to gain an advantage in the air. Skillful user among them can injected it through direct contact with their claws to disturb others internal magicules flow to negate any use of Magics and Skills.

Trivia

 * Coupled with its Ultraspeed Regeneration, this skill makes Charybdis very resistant to both magical and physical attacks, hard to kill with either, however, Rimuru later notes that shockwave attacks would have been very effective and that if they had used that, they would have likely won against Charybdis without Milim's help.
 * Rimuru acquired this Skill alongside Gravity Manipulation by consuming the core of Charybdis and later used Degenerate to fuse it with Molecular Manipulation, resulting in Magic Manipulation.