Although he got a boost in his speed, it wasn't enough yet to match Ibro's speed. There was a marginal difference that made the whole difference in this battle.
That enemy had gotten a mantra that had boosted his body defense to reach a whole new level.
He was sure that his enemy here posed no threat to him, but that annoying feeling of danger kept alarming and bothered him. Each second passed this deep feeling of threat increased with no stop.
That drove him to chase after Ibro. Ibro himself was satisfied with this result. He drew this plan so that his enemy would forget his skeletons' actions and focus on him alone.
What was happening right now? His gamble was over the speed stat, was his speed faster or his enemy's? Reality told him he won this gamble, and that meant he won that challenge.