Double Cast (Alt: Double Bolt) is a Transcendent 2nd class active skill available as Professor.
The Cast Time of this skill cannot be reduced by DEX. Instead, players can equip Berzebub Cards to their accessories.
Double Cast gives the caster a Doublecasting buff which lasts 90 seconds (this buff is shown on the side of the screen as "Magic×Magic"). While active, all bolt spells have a chance of being cast instantly a second time immediately after the first bolt lands (skill level determines the chance). This skill affects Fire Bolt, Cold Bolt and Lightning Bolt, but not Earth Spike. 
- Double Cast's cast time cannot be reduced by DEX, however, Poem of Bragi and Memorize do.
- Despite being triggered by Caprice, Earth Spike is not a bolt skill and is unaffected by Double Cast.