And I understand that I do... but by giving her the tier of 2-C, you are saying that she can destroy more than one universe. You are saying that she can destroy the multiverse... something that I have a hard time believing.
The multiverse is a hypothetical group of multiple universes including the universe in which humans live. Together, these universes comprise everything that exists: the entirety of space, time, matter, energy, the physical laws and the constants that describe them. The different universes within the multiverse are called "parallel universes", "other universes", or "alternative universes".
But if you notice... Winx Club has never stated that the other realms are different universes... but in fact different realms. It's been speculated that they are in fact just different realities, or, even far away planets.
Even if the realms are actually different universes, that doesn't mean that the Great Dragon is strong enough to destroy/create more than one. Didn't the show state that it was tired after it created the Magix dimension? If it got exhausted from the just creating one... how's it going to destroy the multiverse?
Just trying to help sort things out logically.
Let me show you something -
https://www.youtube.com/watch?v=RDT7qGmFIkE This is a scene from Ben Ten when the universe was destroyed. Do you see how it just erased everything? Bloom would need to be able to survive something like that and then re-create all that which was destroyed. Then do it again over and over. That is what being Multiversal mean.
Do you understand the sheer power that is required to even belong in the 2 Tier?
Now I'll be humble and say I haven't seen all of the Winx Club series, so if there is a feat that Bloom has shown that matches that, please share it with me. But for now, I withhold my judgment.