Good drawing ideas are endless, just depends on what you're interested in.
I love looking at magazines for example. Especially nature and culture magazines like the National Geographic, where one can see images of different cultures and traditions that are completely off from what you're used to, you would think they're fictional, you'll even be forced to investigate further. These images can inspire many fantasy ideas for drawing, even abstract ones too.
Such magazines can also have some of the most exotic plants and animals you may never see in real life. Take the opportunity to just study them and see if you can represent them. Or even make them more interesting by the distorting them and adding some imaginary features to them.”