Uncanny Avengers, Vol. 1 #13

Ragnarök is now ! - Against his masters' orders a deranged and vengeful Sentry kills an Uncanny Avenger! No hoax, no dream and only the first casualty of many! - To allow reinforcements from other eras The Wasp must find and destroy the Twins Tachyon transmitter, but first she'll have to defeat The Grim Reaper. - Scarlet Witch makes an impossible choice that will define her forever. - Sunfire and Rogue, alone without back up, must defeat the combined might of both Apocalypse Twins or watch the end of our world!