Murder!

Disguise {4}
Each player sacrifices all nonland permanents.
If Murder! was played by paying its disguise-cost,
you may Exclude up to {x} permanents,
where {x} is the number of times you've cast your commander from the command zone this game.
———{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}{line}
There is a murderer on the dancefloor,
you better not kill the groove D.J.