magarena/release/Magarena/scripts/Ruthless_Cullblade.groovy

[
    new MagicStatic(MagicLayer.ModPT) {
        @Override
        public void modPowerToughness(final MagicPermanent source,final MagicPermanent permanent,final MagicPowerToughness pt) {
            if (permanent.getOpponent().getLife()<=10) {
                pt.add(2,1);
            }
        }        
    }
]