Smash
Break the destructible blocks by pressing Down + Jump when Rose is in the air.
How to obtain
First defeat Talos, then go to the Smash tutorial location marked on the Clock Tower map, enter the trigger area, and complete the story sequence. Defeating Talos is only a prerequisite; you still need to collect the skill at the tutorial point.
Backstory
A rapid dive to the ground that will hurt enemies unfortunate enough to be underneath as well as destroy fragile structures.