Rule · Chapter 1
cr:1.7.5
A modal ability is a choice of modes, where each mode is a base ability the source could have. A modal ability typically contains the phrase “choose [X] [CONDITIONS?]; [MODES]” where X is a cardinal number or a description of the number of modes to choose, CONDITIONS (if any) specifies one or more conditions for selecting modes, and MODES is a list of modes that can be selected.