The Any Shape baseline is the most versatile of all, able to create a straight line of lettering through to a complex Spiral.
Look for the baseline in the list
As with all tools left clicking creates an angle node and a right click creates a curved node, once you have clicked the Create Text button create the baseline shape you left or right clicking along the path you want the baseline to follow.
To create the baseline on a spiral I recommend using the Mode toolbar to open CorelDRAW and create a spiral template to follow.
See the details for this is the following video.