Can someone recommend a free/cheap 2D fantasy art package?

I'm looking to make a 2D fantasy platformer, something similar to Rogue Legacy, and I'm looking for an art package for it. This is just a fun little project, so I'm not looking to spend a lot of money, though a little cost is okay.

I'm looking for just the basics: character sprites, tiles, effects, etc. I really like the look of this:

https://www.assetstore.unity3d.com/#/content/2768

It's just incomplete for what I need.

Can anyone make a recommendation for something free/cheap that will cover the basics of a 2D fantasy platformer?

Thanks!