3-ER for 3 tough status cards. 1ER per tough card is actually crazy.
I won't say it's overpowered, but the only reason it's not overpowered is because of all the crazy stuff other teams can do. This card alone probably won't make Defenders a better tribe for Leadership than Avengers or X-Men. But the ability to produce 1-ER tough cards is still insane and will keep you protected from attacks through the whole game, making it very difficult for the villain to land hits without using piercing damage.
Edit: Above, I reviewed the card mechanically, but there's more I want to say about it thematically.
I like that this gives Defender tribal decks a very clear theme focused on tough cards and blocking. The result is that the Defender leadership decks will play very differently from Avengers, X-Men or Web-Warriors, With each of those, you're usually going to be chump blocking a lot. Defenders actually want you to keep your allies in play so they can protect you and your teammates, and that's a pretty cool change from how Leadership usually likes to play.