By studying dragon anatomy, Jeskai monks have learned how to locate clusters of nerves that will incapacitate even the mightiest dragons.

Pressure Point

Poke a drake in the right place and it becomes as docile as a pet. Poke it in the wrong place and goodbye, hand.

Zendikar Rising

The List

Kaladesh

Fate Reforged

If the target creature is an illegal target by the time Pressure Point tries to resolve, the spell doesn't resolve. You don't draw a card. If the target is legal but doesn't become tapped (most likely because it's already tapped), you do draw a card.