Resultado:

[Código] Botão cortado com gradient animado

				
					selector .elementor-button{
    background: linear-gradient(-45deg, #09E3A6, #B63BEB, #1AE0FA);
    animation: anime 5s linear infinite;
    background-size: 600%;
    --path: 0px 0px, calc(100% - 14px) 0, 115% 100% , calc(100% - 20px) 100%,14px 100%,0px calc(100% - 14px);
    clip-path: polygon(var(--path));
    -webkit-clip-path: polygon(var(--path));
}

selector .elementor-button:hover{
    opacity: .5;
    transition: .7s;
}

@keyframes anime{
    0%{
        background-position: 0% 50%;
    }
    
    50%{
        background-position: 100% 50%;
    }
    
    100%{
        background-position: 0% 50%;
    }
}