From a monster's remains to a fear potion
Diana keeps the Tetracide's body and blood, with the blood stored in a magically sealed container. The creature kills fear, so she wants to use that property against Phobos and Deimos. She starts cutting into the remains to make an antidote. The next issue shows the preparation becoming something she and her friends can actually use.
Fear potion: confidence is not immunity to everything else
Diana prepares the anti-fear potion at the Hieron, working with ingredients, flame, liquid and magical signs before putting the finished mixture in a blue bottle. She will take it herself, but she agrees that secretly dosing a whole city would be wrong. Steve, Ferdinand and Petra later drink it too, and the change in their confidence is obvious.
The useful limit comes when Diana actually has to fight. Taking fear out of the equation does not remove grief, the feeling that something terrible is coming, or the pain of being torn apart. She can be emboldened and still badly hurt. Diana also thinks about fear being masked and Cheetah projecting hers, which keeps the scene from being a clean laboratory demonstration of total fear immunity. This is a tool she prepares and uses, not an announcement that nothing can frighten her again forever.
Ceda Six: a designed machine with magical functions
Ceda Six is a collaboration, not something Diana simply found in a cave. In the flashback, Hephaestus praises Diana's design. She has been paying attention to human technology, and that has influenced what she wants to build. Hephaestus makes the arm and gives her the name Ceda Six. Diana and Circe provide the magic that allows its higher functions to work.
That combination is the point. Ceda can talk to Diana and track a finite power reserve, while magical input is still part of what turns certain functions into action. Before the fight, Diana is told a level-nine use will require 79.2 percent of the available charge. That is why she cannot put on the wrecking-ball protection first and pretend the energy cost does not matter. She chooses to keep enough power for the larger move, leaving herself more exposed.
Later, badly injured by Cheetah, Diana calls for defense nine-dash-nine. Ceda warns that it will use all the remaining power, and Diana accepts that. Cheetah hears the plan and tears the arm off. The detached Ceda is still active and still waiting for the magic words that would execute it. That is where this issue leaves the mechanism. We have the command, the cost and the interruption, but not a demonstrated finished effect. It would be making things up to describe what nine-dash-nine actually does after that point.
From a monster's remains to a fear potion
· Absolute Wonder Woman Magic