The pentacle symbolizes the human body. It represents the human as the potential master of nature, light, air, wind, fire and water; which are controlled by him. In esotericism, it is known as the White Pentagram, and it is a basic protection symbol; a shield that returns evil wishes and curses to its origin. When practicing white magic, it gives protection against dangerous spells.
The deer is a symbol of beauty and light. It's the enemy of the snake.