Sam increased the intensity of the energy vision.
He is not just focusing on the energy of the whole area, instead his focus is mostly on the white wind itself. Whatever formation that is dragging this white wind from all sides, must gather the ice elemental energy within the wind.
And all of that energy should pool up at the core from where it dissipates to the nodes. So, he is trying to get to the core. However, no matter how much he tried, he couldn't see it through the energy vision. It is being masked my the ice elemental energy of the surroundings.
A similar tactic to the one used in the tunnel challenge.
Sam deactivated the energy vision and started thinking.
Meanwhile…
"One hour… not too bad." Elder of the Loki academy clicked his tongue and praised Sam.
"What's so great about it? Its just the first of many." Mangus of course tried to undermine it. But that statement itself is not enough, so he went on with more words.