The reason of the previous is not because Tessa had mastered this technique enough to be able to cast it before calling out its name, but because until the effect was triggered, she didn't know its name nor its special functions.
'I thought, the result of the shield and the fixed-point techniques being combined, would just result in a much more solid defense, maybe impact cancelation like the hammer one, but to think it actually… bounced the enemy's attacks instead of just blocking them', thought the alfear princess as she saw the green energy tree which was surrounding her until a second ago, dissolve in many bright green particles, creating quite the fantasy-like sight.
The techniques obtained through the energy of the Blood Prison realm, are just like the innate abilities learned due to one's lineage, information about them comes to the person in question, instinctively.
