Block unknown numbers using Shortcut App’s Automation feature

Hi! I’ve getting spam messages from scammers, so I wanted to know if there’s a way to automatically block messages that come from unknown numbers if a set of common phrases from scam is present using Shortcuts App.

For example I get a message that ends with, “Use this link to claim your prize” + suspicious link, then Shortcuts’ automation feature will block the number. That’s all.

I know about the manual way of blocking numbers using Messages, but since I’ve been getting so much, it’s become a tedious task to do so. I also know the Filter Messages, but that won’t really help with my case.

Thank you!