Sierra Madre Casino Holograms

Nonlegendary artifact creatures you control have
myriad. (Whenever a creature with myriad
attacks, for each opponent other than defending
player, you may create a token that's a copy of that
creature that's tapped and attacking that player or
a planeswalker they control. Exile the tokens at
end of combat.)
"Most Holograms perform specific functions. The
Security Holograms, ever since the bombs fell, now
perform their function. They will kill anyone
they detect."