For my use case it looks like this:
This listed the 5 most recent rows in my table and listed them in DESC order.
The meat of it is
Slice([Table].Count()-4,[Table].Count()) where you Slice the table and include those from total rows minus 4 to total row count.
So if you had 20 rows, this would be 20-4=16.
Following the example of 20 rows,
Slice([Table].Count()-4,[Table].Count()) is saying start at row 16 and end at row 20 (total row count) and that gives you the 5 latest.
I then added in a sort and numbered list function to list them out.