|Thomas Samuel Eamon Cassidy|
|Citizen of Ireland with an international criminal record.|
|Nation or Planet of Origin|
Partner of Juggernaut
|Base of Operations|
|Mutation resulting in an ability to generate black of force or heat through wood.|
Shillelagh: Wooden walking stick used as a catalyst for Cassidy's mutation.
X-Men Vol. 2
X-Men Vol. 1 #99 (June, 1976)
X-Men Vol. 1 #101 (Oct. 1976)
|Chris Claremont & Dave Cockrum|
Thomas Cassidy lost his fortune and the deed to the estate of Cassidy Keep on a throw of the dice to his younger cousin Sean Cassidy (Banshee).
Turning to a life of crime for the thrills, Cassidy discovered he could become wealthy as a mercenary. While in a third-world jail he met fellow mercenary Cain Marko (Juggernaut) and fostered a long-term friendship.
Using his mutation to engineer a jail break the two mercenaries escaped, but would eventually use their superhuman powers to team as the Juggernaut and Black Tom.