Elmrick, One Man Army

Vigilance, Hexproof
As long as Elmrick is the only
creature you control, it gets +4/+4 and has
First strike.
At the beginning of your upkeep, if you control
no creatures and Elmrick is in the command zone,
you may create a 1/1 white knight
creature token with First strike, sacrifice that
token at the beginning of your next end step.