As a bonus action, you cause your mark to expand, amplifying your attacks. For the next minute, your attacks deal an additional 1d4 necrotic or radiant damage (your choice). However, you take 1d4 acid damage at the start of each of your turns.
This effect lasts for 1 minute or until you choose to end it early (no action required).
Once you use this feature, you can't use it again until you finish a short or long rest.
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