He knew that if he were to use 3-D Supreme Metacs to anchor the 4-D prototype, he would destroy the Supreme Metacs exactly the same way the Divine Metacs used to create Supreme Metacs were destroyed. It would be a great loss, but it was a sacrifice that he was willing to make for the slimmest chance of creating the prototype of a 4-dimensional Metac.
As for whether failure would lead to his death, he didn't care at this point. The presence of the cyclops in the most secret place of his existence made it very difficult for him to worry about the consequences of failure.
So he didn't hesitate to start using the Supreme Metacs to anchor the cubes. He started at the center with the Devouring Supreme Metac.
The first cube had a dimension of 1,1,1, so it needed 3 units of commonality to anchor it. The three units of commonality were taken from the Fenrir.
