Sky Splitter was a move Squawks had practiced countless times. The number of times he had used it in a real situation, however, could be counted on one hand. Due to the time it took for him to prepare it and the state it left him in afterward, it wasn't something he could use in the middle of a fight.
It was great for cutting down trees, though.
When he practiced, he did it to get the technique down pat and make sure he could do it whenever he wanted. He rarely squeezed out every last ounce of strength he had when performing it.
But he had never successfully cut through anything harder than wood, much less an iron cage.
The resistance was greater than he had expected when he first struck the cage. If not for his reliable muscles, he would have failed and caught the rebound of the power he put into the move.
Even now, the muscles he took great pride in were barely enough to drive the edge of his blade into the iron lid of the cage.