The X-Men #95-Good (1.8 – 3) Death of Thunderbird, John Proudstar, Killed In A Plane Crash

"Warhunt!" Part 2 of 2. In order to stop the sinister madman Count Nefaria from raining nuclear Armageddon down upon the world, the new X-Men must fight their way through the Count's mutated bodyguards - the Ani-Men! Plus, one X-Man makes the ultimate sacrifice!

(NOTES: Death of Thunderbird, John Proudstar, killed in a plane crash;
3rd appearance of Nightcrawler;
Earliest use of the word 'Bamf' to describe the sound of Nightcrawler teleporting via an alternate dimension)