Rallying the Troops

When Rallying the Troops enters the battlefield,
you become the general (monarch).
At the beginning of combat on each opponent's
turn, if you're the general, that opponent may
pay {x}, where X is the number of cards in their
hand. If they don't, they can't attack you this
combat.
"200,000 units are ready, with a million
more well on the way " - Lama Su