A single Howling Void inflicted negligible damage on the massive trunk of the World Tree, but dozens, hundreds of them, required the Yggdrasill to divert a considerable amount of their mana to heal the wounds and stop the Chaos from spreading.
Eycos the Garuda helped the Dark Phoenixes to escape by sharing his Life Maelstrom and shielding those grievously wounded with his body. Phoenixes could regenerate even lethal injuries by converting mana into life force with their bloodline ability, Rebirth Flames.
Yet if they ran out of mana or their bodies were pulverized, they would die like anyone else. Eycos' Abomination side allowed him to resist all elements but darkness and by absorbing the abundant world energy no wound would last long.
The one who shone the most, however, was Zoreth.
Her body was big enough to cover both Gentor and Valtak with her wingspan and her Immortal Flames protected the Wyrms near her from all threats.