Blake Ophis Ouroboros wasn't a Demi-Dragon Goddess who often showed her emotions. There usually weren't many things that could cause her emotions to rise to the surface, but amongst the few things that could quickly get a rise out of the Child of the Ouroboros were those she considered precious to her, namely her mom, Ophis, her mate, Luna Pandora Lovegood, and her two daughters, Karna Lovegood and Entoma (who was considering taking up Blake's last name as her own). While she wasn't really the most emotional in her little family, she was without a doubt the most powerful and the one who's wrath nobody wanted to be on the receiving end of. Something that neither Blake's little family nor the people at Hogwarts School of Witchcraft and Wizardry has witnessed the full extent of. Until someone made the foolish decision to emotionally harm Entoma by hurting and even killing three of her Rachniods, leaving only the one known as Muffet, injured but alive.
Seeing one of her daughters cry, for any reason, was one of the things that was a sure fire way to make Blake Ouroboros angry and fortunately for everyone, she could control her anger most of the time. In most cases, the Demi-Dragon Goddess of Infinity's anger wasn't explosive rage, but tranquil fury. This situation was no different, her expression never changing from her usual one of a deadpan. Though people could still easily tell that she was angry. Not only because she was clenching her fists very tightly but also because of the intense aura of murderous intent radiating from her. An aura so intense and murderous that Entoma's heightened survival instincts overrode her ability to think rationally caused her to hide behind something, usually Luna, shaking in instinctual fear while nursing Muffet, who cuddled up closer to the Temnoceran girl in the same kind of instinctual fear.
Simply moving through the halls in the air by simply levitating, Blake searched through the castle for the culprit behind the maiming and subsequent deaths of the Rachniods known as Anthony, Elise and Rosie, while the others either comforted Entoma or helped the Chimera nurse the remaining Rachniod, Muffet, back to health. And that was something that made Blake feel a set of contradicting feelings. Happy that at least one of her daughter's pets/minions was going to survive and make the Temnoceran girl that was her daughter happy, but she also felt anger towards the ones who emotionally hurt her daughter. But seeing as she didn't have a target for her anger, it simply vented out as an aura of murderous intent that radiated from the silvery grey eyed girl indiscriminately. The Demi-Dragon Goddess of Infinity's malevolent aura caused more than a few bugs to feel uncomfortable at best and straight up afraid at worst around her, which made her search for the culprit harder.
That is until she overheard the blonde worm practically bragging about how he and his pet-ants had attacked and killed the Rachnoids that were no longer alive and gave her a target for her fury. The worm in pink known as Delores Umbridge, prompting Blake to head towards the Great Hall where her prey was, completely unaware that her form was changing from her human form to her draconic form.