Uncanny Avengers #13 (2013)

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!