This is a card that you won't want to throw in just any deck, but it could make you really durable in the right type of deck.

If you're doing anything with this, there are four cards I would suggest using.

You should first use Ready for a Fight and Practiced Plan to be able to consistently switch back to alter-ego as needed without letting the villain scheme. 3 copies of Ready for a Fight with 2-3 copies of Practiced Plan would be best.

Second, you should use a copy of both Endurance and Defensive Conditioning to get +6 HP, making it easy to heal above your base hitpoints without losing value.

In the right deck, this is going to be fantastic and help you trivialize damage even more than Protection already does, letting you reliably get a tough card every turn so long as your HP stays in the right range. Which, with multiple cards increasing that HP, should be a pretty wide range to be able to hit consistently.