I love these new Shift spells! However, I've also found a bug.
When using Colossal on the card in battle, I've noticed that the card glistens gold as normal, but the text on the card doesn't update with the new damage output. I also use Shift Piscean in my deck, and that card does update as needed. I can't speak for the others though, as I don't utilize them. Not yet, anyway!