The Key

The Key is a character from Justice League and is a minor antagonist in Knights of the Multiverse Season 2. The human lock-pick as his "friends" call him, he works with many other supervillains and criminals in the Secret Society, and was a part of those that joined up with the Glemy Faction in a bid to conquer the known Multiverse.

Skills & Powers
The Key carries a key-shaped gun that actually has two settings: it can either shoot normal laser blasts or allow him to easily penetrate through doors and other secure areas.
 * Key Gun