Tasha was born with a chromatic dark affinity called "Black Dark". This Chromatic Affinity also gave a super boost to two aspects of the dark element.
Firstly it made her dark magic to have transcendental suitability with space law and secondly it made all deadly aspects of the dark element to be stronger.
The Deadly aspect was not related to the magic to revive death. It meant all the aspects of the dark magic that could be used to kill someone, like poison or corrosion etc. That made her super strong, but that was not the end of her capabilities.
With just that it would have been hard for her to keep up with literal monsters like Stella and Rein.
She was also born with two inherent special abilities just like Stella. In her assassin days Tasha kept these abilities of her a secret even from the organisation she was working for.
That was why, she was able to kill every member of the organisation and was able to get rid of it alongside Rein and Stella.
Her first ability allowed her to transform into a complete beast form. In this form, Tasha would be an over 20 meter tall wolf. She called this ability "Beastification', but Rein liked to call it "Primal Form".
The beastkins were actually inheritors of the Primal Beast Bloodline. The Primal Beasts were born alongside the world itself at the very beginning of creation and the beastkins were created by them. Currently no Primal Beasts were alive as they were all killed in a disaster uncountable years prior.
And the form of the beast that Tasha could take was that of a Primal Beast. So she was currently the only living Primal Beast of this world. Even though she was only 19 years old.
Due to this inherent ability of hers she could freely change between her humanoid form and beast form without any limitations. Actually both were her real form.
It's just that the Primal form was too large and she was incapable of changing her height in that form so she did not usually use it much, as it was quite inconvenient.
As for her second inherent ability, it was also quite a strong one. It could be simply referred to as "Equipment Enhancement". This ability allowed Tasha to boost the quality of an equipment with which she had a close relationship, by one level.
All the items that Tasha were mostly using were divine grade ones, so that ability transformed them into peak tier items of this world.
But that was not all. This ability was not restricted to only Tasha but if she considered someone to be her closest family, then their favourite items could also enjoy the blessing of this ability. Obviously the effect was not as good as it was with her own items, but it was more than good enough.
But being a specialist was always better than slightly knowing many things, so Tasha solely focused on just those two aspects.
But as she grew stronger and stronger, her ability to control those two became almost perfect reaching some kind of limit. So she was finally able to focus on other aspects of the dark element and her current experiment was a result of that.
What Tasha did here was to utilise some of the hardest concepts related to dark magic, which were Devouring, Assimilation and Compression. She devoured the elemental attacks, assimilated it with her own dark magic and compressed it to the limit to maximize the output.
Then she just released it and this was the result. It sounded easy but doing something like that was quite challenging for anyone.
But she was not done. Next she wanted to try another major aspect of the dark magic which was gravity. She thought of the most effective way to use this gravity and now it was time for her to check if her hypothesis was correct or not.
Tasha jumped very high and reached over the boss' heads. Then she quickly dropped down with an axe kick. Just before contact she increased the weight of the legs by a thousand times and the middle dog head was smashed because of it.
Even the ground was filled with cracks as Tasha was unable to remove the weight before touching the ground.
As the middle dog head was crushed, the last remaining bull head suddenly covered itself in fire and tried to collide with Tasha. This time she increased the weight of her hand and punched that bull head. Just as expected, the bull head also exploded and the boss was killed.
Rein came to Tasha and congratulated her with a kiss. Stella also congratulated her good sister. Then Rein said -
"Those techniques were good, but I think they don't suit your fighting style though."
Hearing this Tasha replied -
"I'm at a bottleneck when it comes to space and killing. So I tried to use every kind of aspects of the dark element. I am still working on other moves which will suit my fighting style. For now I only managed to master these two techniques."
"I see. It's good that you're trying out other stuffs. You know, focusing only on the best qualities is good and all, but remember we are immortals. So instead of becoming a master of some, we should try to become a master of all as we are able to afford it."
Hearing Rein's words Tasha and Stella both nodded their heads. Then they simply went to the treasury of the dungeon to take their prizes and left the dungeon.