A simple plugin that implements https://squibler.io/dangerous-writing-prompt-app in Obsidian. Choose a time limit – 5/10/15 mins or custom – and hit start. If you stop writing for 5 seconds all of the note’s content is erased (except Frontmatter). Deleting doesn’t count, only typing new text counts. Copying is disabled so you can’t save what you wrote until the time is finished.
A wonderful way to truly free write, journal, or get over writer’s block! Try writing a little more dangerously.
Plugin link: https://obsidian.md/plugins?id=dangerous-mode