The Lil License kind of makes sense if you think about it as an attempt to add explicit patent protection to an ISC or MIT-style license. But only "kind of".

What the patent system gives a patentholder is the ability to selectively prohibit others from making, selling, or using some product or method protected by the patent. The Lil License is weird in that it only explicitly mentions the latter.

Its text regarding copies of the license is also very weird.

Please do not use this license.