Can't identify this Breath of the Wild ability

I've spent over 100 hours playing Breath of the Wild, but I haven't been able to unlock this ability. I'm confused because I feel like I've learned and used all of the game's mechanics. What could I be missing?

Ability Controls Screenshot

Can anyone identify this ability and explain how to unlock it?


Solution 1:

From this GameFaqs topic:

Jump Attack. Talk to Steen in Kakariko Village at night. He's in front of the General Store.