August 2018 Sketch Tier Sketches 13-18 (Patreon)

Here's 13-18 of the sketches!  If you're a Sketch Tier, Sketch+Secret Gallery Tier ($20), or Custom Card Tier patron, let me know your choice sometime today or tomorrow.  Otherwise I'll pick at random.

The sketches are as follows:

13. Scary Jordana

14. South Sphere happy hammer-wielding military robot tank

15. South Sphere "flamingo on a motorized unicycle" combat bike

16. Genuinely happy Samsid

17. Gray

18. Creation of Littlehands