The Glyph of Moonfire shifts the damage of a druid's moonfire spell so that the initial damage is inconsiderable but the damage over time is much higher. It results in an increase to the spell's total damage, but removes the instant burst damage. Because the damage over time component is more powerful, it pairs well with a Glyph of Starfire which increases the duration of Moonfire's damage over time by three seconds when Starfire hits.