heroes - js advanced

function solve() {

    let mage = (name) => {

        return {
            name,
            health: 100,
            mana: 100,
            cast(spell) {
                this.mana -= 1;
                console.log(`${name} cast ${spell}`);
            }
        }

    }
    let fighter = (name) => {

        return {
            name,
            health: 100,
            stamina: 100,
            fight() {
                this.stamina -= 1;
                console.log(`${name} slashes at the foe!`);
            }
        }

    }
    return { mage: mage, fighter: fighter }
}