This sounds like a riddle or a joke. If you're looking for a humorous answer, here are a few possibilities:
* "You write a really convincing story about how delicious a tiger tastes." (This plays on the idea of words being powerful, but obviously wouldn't actually harm a tiger)
* "You use the pen to sign a petition against poaching, protecting tigers from harm." (This highlights the importance of conservation efforts)
Please remember that tigers are endangered animals and deserve our protection.