Belligerent Gladiator

Menace, Haste
When The Berserker Enters The battlefield it gets +1/+1 if their are no other creatures on the battlefield that you control.
{t}Throw Weapon —-1/ on Voluntary Gladiator until end of turn. /-1 on target enemy creature until end of turn(Activates as a sorcery)
{4}Voluntary Gladiator gets first strike until end of turn(Activate only if this creature has a +1/+1 counter on it).