Some comments:
Like furball said, what does a whip have to do with Entropy?
This would see very little use - it's only viable in Rainbow decks (if you're using it for the 3 damage, may as well use Discord), and costing 5
for a random weapon is rather expensive (as well as a turn delay).
Unless I'm missing something, the upgraded form is exactly the same as the unupgraded - Why?