After killing Agnarr you must head upstairs to Karana and:
You say, 'Hail, Karana'
Karana looks down at _____'s face. He seems so insignificant next to the massive stature of the Rainkeeper. 'Don't worry mortal, Askr is unharmed, I have set him on a journey that will take him to all corners of this reality. He will either find the balance of the Fallen or he will die trying. And what of you champions? Do you wish to (follow the path of the Fallen:I will follow the path of the Fallen.)? A more dangerous path has never existed. Defy the will of the Pantheon at your peril.
You say, 'I will follow the path of the Fallen.'
Karana begins to laugh quietly. You seem to notice a great storm cloud brewing once more above him. A sudden arching bolt hits you, but you are unharmed. Instead a tome written in the language of the gods appears in your hands. 'Then let what I know be yours to know as well. Your path leads you onward _____. The path to power or ruin, the choice is up to you. Speak the words and I will (send you on your way:Send me on my path.).'
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Karana says, 'Karana begins to laugh quietly. You seem to notice a great storm cloud brewing once more above him. A sudden arching bolt hits you, but you are unharmed. Instead a tome written in the language of the gods appears in your hands. 'Then let what I know be yours to know as well. Your path leads you onward _____. The path to power or ruin, the choice is up to you. Speak the words and I will (send you on your way:Send me on my path.).''
You say, 'Send me on my path.'
Karana begins to cast the gate spell.
Karana begins to cast a spell.
LOADING, PLEASE WAIT...
You have entered Plane of Knowledge.