Select a Value from Dynamic Tags feature of the Dynamic Tag field.
WARNING: this is NOT created to use as Media select, use the Dynamic Tags feature to generate a Dynamic value.
The Dynamic Tag setting must become Dynamic like this (you can use Token or any other Dynamic Tag)
You can compare the Dynamic value with multiple comparison operators:
Not isset or empty;
Valorized with any value, the opposite of the previous condition, so the Dynamic Tag is not empty;
In Array, useful only if the Dynamic Tag retunr an array (like an ACF Gallery or a Token Query);
Not Equal to.
Most of them require a Value to perform the comparison.
You could also use a Dynamic Value that uses its own Dynamic Tags.
Dynamic Tags Token with value [query:post] if Empty:
display an Element only if no posts are published;
Dynamic Tags Token with value [query:post|count] if Greater than a numeric Value:
display an Element only if there are more than x posts;
Dynamic Tags Post Date if Greater than a date Value (in format "Y-m-d H:i:s"):
display an Element only if Current Post published date is more recent than the specific date;
Dynamic Tags Token with value [post:content] Contain a string Value like "DCE":
display an Element only if Current Post is talking about DCE;
Dynamic Tags Woocommerce Product Price is Less than a price Value:
display an Element which a message that could be applied the shipping costs;
Dynamic Tags Request Parameter in Get Equal to "yes":
display an Element only if in page url there is the get parameter valued "yes".
... there is no limit, you could create your own combination.