Of what happened next, I will not tell in my own words but instead give you the account of Lianna Swiftfoot, then a young druid and follower of the missing goddess:
“…In a way I was lucky, for the group that had rescued me from the battlefield was one of the larger units, still several hundred strong, though more than a third of us were injured and unfit for battle. My own leg wound had begun to fester, and I was unable to call on Ulane’s power to halt the infection. None of Her other druids fared any better, and in my heart I knew She was dead.

Our unit had fled far to the east and we were encamped on the banks of the river Jon a few days travel northwest of Ilianin. On the horizon we could see the borders of the great forest. Our scouts had reported other groups of survivors, but we were scattered and the undead ruled the plains, hunting down any living being they encountered. It was all we could do to avoid being decimated further. Despair was taking hold among my comrades and myself. Ulane and Ra dead, Jaysek and Kieron missing… It seemed like the end of the world – the world of the living – was at hand.

My musings were interrupted when I sensed a presence near to me. Others had noticed it, too and all turned to stare at the lone figure that was standing still at the entrance to our encampment. She was a slight figure, cloaked in a simple robe, her head hidden beneath a hood. She seemed to be waiting for everyone to notice her and then she began to speak.

‘I have come to bring you dire news. As most of you have feared, Ulane is no more. She died from wounds received at the hands of the legions of Xanathar. She gave her life, so you would survive to fight another day. But before she passed away, she came to me and bestowed upon me the task of continuing the work she has begun.’ With these words she flung back her cowl and revealed a woman of undeterminable age with black hair and ice-grey eyes framed with lines of sorrow. Also she seemed to grow taller and more powerful with every word she spoke. ‘My name is Chondra, and I will see to it, that Xanathar and every last one of his minions are returned to an eternal grave!’

As she finished I felt my magic returning to me, the connection to my goddess that had been lost re-establishing itself, and I knew that the woman before me was no simple woman but the successor of Ulane herself the new goddess of nature!

Chondra then passed along the ranks of the wounded, and where She looked, infections receded, where She touched, broken bones mended and where She smiled diseases fled…”

Here ends the account of Lianna Swiftfoot, but it seems that in that hour all former followers of Ulane heard Chondra’s words and regained their powers, for in the next days refugees streamed to her banner from all directions, increasing their numbers a thousand fold. Chondra ordered the camp to be relocated across the river, closer to the great forest and to prepare for another battle with Xanathar. When the lich had finally gathered his forces and came, the defenders were well entrenched.

Xanathar apparently held the young goddess in little esteem, for he sent his minions across the river seemingly intent on simply sweeping away all opposition. But as the front ranks had just reached the far bank, the river seemed to come alive with algae, roots and other plant life, that until then had been drifting peacefully in the water, tearing thousands of undead to shreds to be swept away to the sea. At the same time a veritable forest of trees began to grow at unnatural speed in the midst of Xanathar’s army and began clubbing zombies and skeletons to pulp and splinters before they even thought to strike back. Even then their claws and clubs were woefully inadequate for dealing with oak-sized wooden enemies.

With the unlife army in complete disarray, mages created magical bridges across the river, allowing Chondra’s army to rapidly cross the river and decimate Xanathar’s forces even further.

It was quickly obvious who would carry the field this day. Finally Chondra made out the lich himself and went to confront him. The battle between Chondra and Xanathar was different than the earlier battle of Ra. While Ra had looked imposing with his golden armour and flaming sword, Chondra wore only the humble robes she’d worn as a mortal. Also this battle was fought not with weapons but with magic, so few can say what exactly happened between the two, but after a long battle Chondra finished a spell and the lich Xanathar crumbled to dust. Witnesses say, Chondra looked exhausted but unhurt when she proclaimed the lich finally and completely dead.

The Battle of Jon River ended soon after that. Those undead as has not perished in the battle were hunted down and destroyed in the following weeks.