This Black and White ppt could be a nice source for halloween themes for you. You can use spiders and shadows to complete the scene.
Tag: Spider
Spider Web Google Slides Themes is a professional-looking template design for Creating a presentation on animals which play an important role in biodiversity & keeping
Arthropod Google Slides Themes is a professional-looking template design for Creating a presentation on animals which play an important role in biodiversity & keeping balance
Web Google Slides Themes is a professional-looking template design for Creating a presentation on animals which play an important role in biodiversity & keeping balance
Spider Google Slides Themes is a professional-looking template design for Creating a presentation on animals which play an important role in biodiversity & keeping balance