<P> Some cards may require their owner to pay mana of two or more colors . These cards are multicolored . Some multicolored cards also use hybrid mana, which can be paid with one of two different colors . For example, the card Golgari Guildmage can be cast by spending either two black, two green, or one black and one green mana . Some cards have costs which can be paid with any color of mana, but are cheaper when a color requirement is met . For example, Beseech the Queen costs either three black mana, two black and two other, one black and four other, or six mana of any color . In all cases, a card's color is determined by the mana symbols in its cost, and not by the specific mana used to cast it . </P> <P> There are four general categories of abilities: </P> <P> Spell abilities are abilities that are followed as instructions while an instant or sorcery spell is resolving . Any text on an instant or sorcery spell is a spell ability unless it's an activated ability, a triggered ability, or a static ability that fits the criteria described in rule 112.6 . </P> <P> Activated abilities have a cost and an effect . They are written as "(Cost): (Effect .) (Activation instructions (if any).)" A player may activate such an ability whenever he or she has priority . Doing so puts it on the stack, where it remains until it's countered, it resolves, or it otherwise leaves the stack . See rule 602, "Activating Activated Abilities". </P>

What do the numbers on magic cards mean