Zeke wouldn't have imagined that he would meet his demise just like that, so did Dexter. In his eyes, his father was the strongest black magic, who couldn't be beaten. He was a perfect example of power.
The plan from Decratic was clear that Zeke would inflict black magic, in which it would affect her and it would be easier for Zeke to get the luna.
However, they didn't count for her rage, or rather… Zeke and Dexter didn't count it. Because there was no way Decratic didn't know what kind of result that would happen if you pushed her too far.
Zeke was an important pawn, but Decratic's main goal was always Na. Iris in extent.
Lu had recognized it earlier that Zeke was the second pillars and Lou had showed it what happened when you destroyed the pillar. The backlash of his power and that was what happened to Iris.
The moment she killed Zeke, she experienced the backlash of her power.
