To determine the total cost of a spell, start with the mana cost or alternative cost you’re paying (such as the alternative cost of Force of Will), add any cost increases, then apply any cost reductions. Force of Will’s mana value is always 5, no matter what you paid to cast it.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.