Cost: 2.

Play under any player's control.

Max 1 per player.

Resource: Exhaust Nerves of Steel → generate a resource for a Defense event.

Andrea Di Vito & Laura Villari
Quicksilver #17.
Nerves of Steel

Although the transcription doesn't say it, this only generates a resource for a defense event. The card picture gives the correct text.

As for a review, it's a decent card, although there aren't that many non-zero cost defense cards that this can target at this moment, so you really need to be running quite a few in order to get usage out of this. So far, I believe that all hero defense events cost 0, so there's no extra value in running this in any specific hero as of yet. Maybe once Groot comes out, there will be some better options.

Saan · 3020
A hero who might in theory use a lot of defense events is quicksilver. — L3w15 7 · 9246
However he won't get much use from this because frictional resistance can pay for these events instead and will ready immediately since quicksilver will always ready in the villain phase. — L3w15 7 · 9246