The gas that Caesar produces is very poisonous.[8] The gas appears to be explosive when set alight, which allows Caesar to create controlled explosions without harming himself.[8] Additionally, the user has the power to manipulate other preexisting gases in any given location, and can suffocate their opponents by removing the oxygen in the area. This gives the user two options to instantly defeat their opponent, allowing Caesar to knock out Luffy after realizing that Luffy was immune to poison (however the area effect is finite, so if someone escapes the oxygen-free zone they will be able to breathe again).[9] They can even merge with such gases to enhance his own power, depending on the gas being absorbed, all the while being immune to the toxic effects himself.[10]