Force the Action

Sacrifice two Squirrels: Reveal a card at random from an opponent's hand. It gain flash until end
of turn. If that player can cast that card they must. If they can cast it, then they choose a player. You may choose targets for that card as long as they are controlled by the chosen player.
"If we move some of our armies here, it will force them to play their reserves, leaving our main force free to strike here."