You can spend a Hope to Help an Ally who is making an action roll you could feasibly support. When you do this, describe how you’re helping and roll a d6 advantage die (see the “Advantage and Disadvantage” section). Any number of PCs can Help an Ally as long as they spend a Hope to do so. The ally being helped might also gain advantage on the roll from another source; in this case, they’d roll their own d6 advantage die. If the ally has gained advantage on a roll from multiple sources, they take the highest of all the advantage dice rolled and add the result to their action roll.