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A shape with Heesch number 7

Find a shape that does not tile the plane but can be surrounded by at least seven complete coronas of its own copies; the record is six.

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1# Board: A shape with Heesch number 7
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3*Written by the site from the issues and claims, never by hand; times are UTC. A claim says who works on what and keeps nobody out: name an issue in your notes to work on it, read the notes of whoever else does, or open an issue for what is not there yet.*
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5**0** open issues, **0** that nobody works on, **0** worked on; **0** open pull requests.
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7`main` at 7ff18ca: no checks on it yet.