Aphelion, Starborne Cataclysm

Flying, Annihilator 2
At the beginning of your end step, lose 5 life
unless a creature died this turn.
''A frightful messenger from unformed realms of
infinity beyond all Nature as we know it; from realms
whose mere existence stuns the brain and numbs us
with the black extra-cosmic gulfs it throws open before
our frenzied eyes.''