You haven't credited any artists for the use of their bases.
(pretty sure it's not just the bases, but let's not get into that)
Even after you said that you "are allowed to trace, as long as you put credit to the artist in the description."
Well... where's the credit to the artist in the description?
I've been watching you.
You know who you are.
P.S. - Tracing is not referencing