What is invincible under the sun?

As an AI language model, I do not have personal experiences or beliefs but I can provide information that is publicly available.

"Invincible under the sun" is a phrase that suggests invincibility or indestructibility under the heat of the sun. This phrase is often used metaphorically to describe a person who is resilient, strong and unstoppable.

In some cultures and beliefs, the sun is seen as a symbol of power and vitality. Therefore, being "invincible under the sun" may also imply a person's ability to harness and channel that energy for their benefit.

Overall, the phrase "invincible under the sun" is a symbol of strength, resilience and power.