Furball diminished the power of Lucifer's attack significantly until it only contained a sliver of it's original strength being a peak tier 5 attack at best.
However, the threat was still very much real and the last person to completely stop the attack was none other than vice guildmaster Karna.
Just a fraction above Rudra's head, Karna extended his arms above his head and blocked the brunt of the attack with his sword as every last muscle in his body visibly tensed.
Karna pushed himself to the limits, not ready to accept that the attack would get past him and no matter how much his body threatened to give out under the pressure, through sheer willpower he continued and did not let the attack fall down at all.
He was soon joined by Jhonny English who halved his burden and together the duo finally completely obliterated Lucifer's attack.