Last event worked fine with a 1800-1900 atk monster deck + some spells and traps to get rid of her yubels like ECon.
As soon as you get like minimum 2 Yubels + Incarnate start farming her with those 2
Yubel's effect is continuous, so there is no way you can destroy it via battle, unless with skill drain trap, or you can use offerings to the doomed or super rush headlong, or banish it with dark core, or just use mons that can direct attack and with stall cards, plus some revival cards if your mons goes to grave