Read more about Smasher (Isabel "Izzy" Kane) at: Wikipedia

Official Site: Marvel

Smasher is the name of multiple different fictional characters appearing in American comic book published by Marvel Comics.

Smasher first appeared in X-Men #107 (October 1977-February 1978), and was created by Chris Claremont and Dave Cockrum.

A new Smasher, named Isabel Kane, appears as a member of the Avengers in the Marvel NOW! relaunch. Her name was originally given as "Isabel Dare", but the collected edition of her first appearance said her surname was "Kane". According to editor Tom Brevoort, this change was deliberate; he even stated that "Dare was a mistake in the first place," as the character was intended to be Captain Terror's granddaughter from her first appearance.

Yet more Smashers, operating directly under Imperial control, appear in the 'Infinity' crossover.

Smasher (Isabel "Izzy" Kane) has not been a contender in any CBUB matches.