Domino

Indestructible
As long as a domino has left the battlefield this
turn, Domino loses hexproof, shroud and indestructible.
Whenever Domino is put into a graveyard from
the battlefield, if no one controls any dominoes,
Domino deals damage equal to the number of dominoes that left the battlefield this turn distributed among any number of targets.
Otherwise, destroy target domino.