Azazel, Dreadhorde Emperor

Haste, Flying, Ascend.
When Azazel, Dreadhorde Emperor attacks you
may search your library for Neheb, Dreadhorde
Champion and put it onto the battlefield tapped
and attacking.
Whenever Azazel, Dreadhorde Emperor deals
combat damage to a player and you have city's
blessing, cards in your hand gain madness, and
cards in your graveyard gain flashback; all
alternate costs become equal to casting
cost until end of turn.