No debut trigger Ebondeath
I received a Ebondeath card from my Graveyard l d (as random zombie) and proceeded to play the next turn. There were several creatures in all graveyards, but when I played it from my hand the Debut trigger didn’t respond. I didn’t get a pop up or anything, the game just proceeded the the end of the turn.
I also had this happen from a Mastermind Lazav that was transformed into an Ebondeath. The debut effect had the fizzle sound effect go off.