By that logic... 4* shira's switch is always on. Edo tensei han's switch is always on and etc... But they also turn on when they use their respective mysteries and off when the round ends just like kabuto sage mode. They clear debuffs when kabuto doesn't. The only difference is the switch being associated with explosive mode. Sorry but this is flawed logic and suggests that there are 2 versions of immunity in this game. If there are 2 versions of immunity then please show me where in the skill description of these units does it define which immunity type is being granted.