Bolts of Doom is a unique Level 4 Evocation Spell and a variant of Kereska's Favour that allows its caster to imbue themselves with the power of lightning and unlock resistances and spells associated with it. It is granted by Markoheshkir.
Description
Embrace Kereska's lightning bolts to gain Resistance to Lightning damage. Your lightning spells deal additional Lightning damage equal to your Proficiency Bonus. When you deal spell damage, gain 1 Lightning Charge. While attuned to Kereska's lightning you can cast Chain Lightning and Lightning Bolt.
Properties
Grants the following:
- Crackling with Kereska's Lightning status (
Duration: Until Long rest) - Can cast
and 
once each per Short Rest.