Trying to control massive magical energy to dissipate an enemy spell is extremely taxing and difficult, and can easily go wrong. Therefore, just as with casting spells, if two or more of the Dispel dice come up as 1s, the attempt to dispel a spell automatically fails. Regardless of how many bonuses you might have accrued from magic items, etc, a roll of two or more 1s is always a failure. If a player rolls two or more 6s when dispelling a spell, the dispel succeeds automatically. Note that an automatic fail takes precedence over an automatic success when dispelling a spell.