Like Mana, Loyalty is a resource gained during a game, which may be spent during the same game.
Matching Loyalty gems () on the gem board provides an amount of loyalty equal to the number of gems matched. In addition, every match of colored gems provides +1 loyalty. The maximum loyalty which can be accumulated at a time is 30.
Certain cards can also provide loyalty to your Planeswalker.
Loyalty is spent by activating one of the three Planeswalker abilities. No more than one Planeswalker ability may be activated per turn, and certain cards exist which suppress the use of Planeswalker abilities.
Each planeswalker has three abilities, commonly referred to as their First, Second, and Ultimate abilities.
Typically, each subsequent ability costs more loyalty. Using an ability subtracts its loyalty cost from your loyalty pool. Players may use their First ability as soon as enough loyalty is accumulated, or keep building up loyalty further for the Second or Ultimate abilities, which are generally more powerful.