Lightning Blast
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Lightning Blast is a class action granted by 
The Blast Pendant. This ability allows the wearer to empower a lightning spell or cantrip to deal extra damage equal to the number of Lightning Charges accumulated.
Description
Focus the electricity in your veins to strengthen your next spell or cantrip.
Your spell or cantrip that deals 
Lightning damage[See Notes] will deal additional Lightning damage equal to your remaining 
Lightning Charges.
On hit, all of your Lightning Charges are consumed.
Properties
- Cost
Bonus Action- Details
Range: Self
Recharge: Long rest
Condition: Lightning Blast
Lightning Blast 
Duration: 2 turns
- Your next Lightning spell or cantrip deals additional Lightning damage equal to your remaining Lightning Charges.
- On hit, all of your Lightning Charges are consumed.
How to learn
Granted by items:
Notes
- In-game, the description says that this action works specifically with lightning spells, but the conditions are not actually that restrictive. It works with any spell so long as it deals some lightning damage. Since this action requires having Lightning Charges anyway, all damaging spells will deal at least 1 Lightning damage. As a result, this action can be used with any damaging spell.