Using a paint worklet as a mask

file.css

.jagged {
    --tooth-width: 80px;
    --tooth-height: 30px;
    -webkit-mask-image: paint(jagged-edge);

    /* other styles as needed... */
}

.slot:nth-child(1) .jagged {
    background-image: linear-gradient(to right, #22c1c3, #fdbb2d);
}

.slot:nth-child(2) .jagged {
    /* pixel art from Iconoclasts, fun game! http://www.playiconoclasts.com/ */
    background-image: url('iconoclasts.png');
    background-size: cover;
    background-position: 50% 0;
}