Ankh – Wikipedia, the free encyclopedia
The ankh (symbol ☥) was the Egyptian hieroglyphic character that stood for the Egyptian word ˁnḫ “life”. Egyptian gods are often portrayed carrying it by its loop, or bearing one in each hand, arms crossed over their chest. It is also known as the Egyptian Cross, the key of life, or as crux ansata, Latin for “cross with a handle”. It has been taken as a symbol by many Neopagans.
If I remember correctly, in the Commandeer Keen series of PC games, picking up an Ankh would give Keen temporary invincibility.