Mafūba (魔封波, Demon Sealing Wave, Magic Seal Attack, Demon Incarcerator, Evil Containment Wave, Mafūba Wave) - a technique designed to seal demons away by sucking them into a container with a special "Demon Seal" ofuda on it. The move requires so much of the user's life force to perform that those who use it, whether successfully or not, are likely to die soon afterward. This move was first used against King Piccolo by Mutaito to trap him inside an Electric Rice Cooker (called the Denshi Jar by fans) during his first rampage. The "Denshi Jar" can be any type of container, as long as it can be sealed shut after the technique has been completed. However, the smaller the container, the harder it is to aim the target into its opening.