Creature Feature 21. The Unborn Assassin. A nimble and stabby stalker. Each download (a mere $0.50) includes a new monster with cool art, detailed lore, adventure seeds, a paper mini design and a virtual tabletop token. Everything the busy DM needs for an easy encounter. :D
www.dmsguild.com/product/246368/Creature-Feature-21-Unborn-Assassin-CR1