The adventure side here has been shifted out of blue some time ago.

https://magic.wizards.com/en/news/making-magic/mechanical-color-pie-2021

> "Transformation" (Target creature becomes a (color) (card type) with N power and N toughness.)

> Primary: Blue

> Transformation can be temporary, through a one-shot spell that lasts for the turn, or more permanent, usually through an Aura. It overwrites the base power and toughness of the creature. This ability used to be in both blue and white, but we decided to focus it in blue. Sometimes blue can overwrite what the creature is currently doing and just make it the "transformed" creature. The one thing that we've taken from blue is destroying or exiling a creature and then giving the controller of that creature a creature token as a means of flavoring transformation. That is now a white ability flavored as giving compensation for destroying/exiling the creature. This means all of blue's transformation abilities are auras or limited effects on spells or activations.

> Destroy target creature. Its controller gets compensation. Primary: White

This ability used to be in white and blue (flavored as transformation in blue), but it's now just a white ability.

That being said, it might be somewhat more acceptable here due to how you still need white to get take full advantage of the card here. Albeit a 2/3 vigilance for isn't much of a bonus but it is still a body for the board.