Power is the number in the lower left corner of a creature card. A creature's power determines how well the creature will battle other creatures. When creatures battle, the one with the higher power destroys the other one. In a tie of equal power, they both destroy each other.

Some creatures have plus signs (+) next to their power numbers. The plus sign is a reminder on creatures that sometimes get extra power from special abilities like "power attacker."

Some other creatures have minus signs (-) next to their power numbers. The minus sign is to show that when a certain effect is triggered that the creatures sometimes lose power. When a creature has its power reduced to 0 due to an effect of a card ability, it is destroyed.