Giant Shark Origamiracle

Fold into Existence. You can use an action to write the word 'Shark' on this paper using any kind of writing implement, in a language of your choice. When you do, the paper magically folds and shapes itself into a small paper shark. While underwater or near a body of water, you can use another action to pull on a small paper tab and drop the tiny paper shark into water. The tiny shark swims to an unoccupied 10ft. by 10ft. space within 30ft. of you where it then transforms into a full sized Giant Shark made of paper.   This Giant Shark is vulnerable to Slashing damage but has all other statistics and abilities of a regular Giant Shark. In combat it rolls its own initiative. It is friendly to you and your allies, understands your languages and obeys your spoken commands. If you issue no commands, the Giant Shark defends itself but takes no other actions. The Giant Shark exists for up to 1 hour. At the end of the duration, or when the Giant Shark drops to 0 hit points, the paper shreds itself into tiny pieces and is completely destroyed.