When Odin put his hand on the tree, it saw the experience of Azief and Alsurt. And in front of Odin is Alsurt.
Odin spoke to Alsurt, acknowledging that he had known about the relation between him and Alsurt
This is the connection.
No, to be more accurate, Odin found Alsurt because he had a connection with him
And even though Azief did not know the true intention of Odin, he does feel Odin feeling.
Odin shielded his mind .
Even though Odin gives him his memories, all the other stuff beside that is shielded from Azief mind.
But he does have his intuition. Odin wanted to meddle in this cause and effect.
That is why he met with Alsurt.
Wargod had explained to him, many beings that knows and deduced Azief future, avoids him like a plague.
Because they did not want to get entangled in this cause and effect
Once they enter, it is hard to extricate themselves.
Because when they enter, they could only either be chess pieces and the chess player.