Ancient Light

The Ancient Light is a level-up item that can be obtained by Sonic and Shadow in Sonic Adventure 2.

To use this item, Sonic or Shadow must go into a spin dash, and after a few seconds, the character will stop spinning, and they will be surrounded by orbs of white light as long as they keep holding down the action button. Releasing it will cause the character to perform rapid homing attacks on all enemies in the vicinity. The item is most useful when a P-100 Artificial Chaos transforms its body into Cells, allowing the player to destroy every one of them with ease.