Stellaris damage command

All ships in the selected fleet take <span class="parameter parameter-primary">Amount</span> hull damage.

Command syntax: damage <span class="parameter parameter-primary">Amount</span>
Example: damage 100
How to open the console in Stellaris: Press the ~ / ` key to open the command console. This key is located at the top left of the keyboard, usually under the F1 or ESC key. Type the command and press the Enter key.