While being able to sacrifice for free is great, tutoring is often better
Its a bit better than that, and it subtly gives some hate to the decks that revolve around interactions with tokens like Treasure tokens, or even Clue tokens
But theres a combo in Amethyst with Mulan Reflecting thats even more on theme Use the song Reflection to look at the top 3 cards of your deck and rearrange them
There are aggressive and control decks using black, blue, and white, but the only top build using either red or green right now is a ramp deck
Giving a creature +3/+0 and trample is a good effect, yes, but like Disorient, it's overcosted
The only unfortunate thing is its colors, as a good chunk of the good mutate cards are blue or green