Another deterrent for your opponents taking the monarchy is Fate Unraveler and Underworld Dreams
It was my first time meeting her in person and talking, and I was so happy
If a creature is put onto the battlefield attacking (thanks to Hero of Bladehold, Preeminent Captain, or the Ninjutsu ability, for example), that creature's controller may choose the defending player or planeswalker that it will be attacking in the normal way
Still, it's far better than other options that don't do quite the same, such as Omen of the Dead only returning the target to hand
Boosting and Protecting Humans Greymond, Avacyn's Stalwart can give two relevant abilities to all your humans, and possibly +2/+2 if you have enough of them
Whether you prefer the aristocratic vampires of Innistrad , the more savage clans of Zendikar , or the psychic vampires of Ravnica, theres a vampire commander for you