Combat Power(CP)

Combat Power, a metric to describe how strong one's character is, can be raised in a few ways:

Leveling up / Attributes

Gear

Gear upgrades

Brooms

Pets

Beads

Constellations

Honor Titles

Glory Titles

Bestiary

Quests

VIP

Arena Champion Title

Strongest Guild Buff

There are also temporary measures to increase CP:

Mage/Mercenary Buffs

Stat Elixirs

Penya/Diamond buff in Dungeons

Guild Buffs