Trumpeter, Herald of Death

Surge {1}{w}: Cast this spell for it's surge cost
if a fiend demon has dealt damage this turn.
If Trumpeter is defeated by a creature that is enchanted, send all creatures
with negative/positive power/toughness enchantments to their respective
player's graveyard.
When Trumpeter is defeated, search your library
for a horseman fiend creature and play it onto the battlefield. Then the seven angels who had the seven trumpets prepared to sound them.