In order to ignite the northern lights no matter how dark it is, simply just insult them:
 In Finnish: Eppä paska pala nyt Kylläpä olet mitätön Or in Sámi: Ippu paiske buolle dal Gal lee heitto, go i buolle |
In Finnish: You shitty one aren't burning right now You sure are worthless Or in Sámi: You shitty one aren't burning right now It sure is bad you're not burning |
And they will ignite and soon, strike to kill.
(This is so mean!! Sámi incantations truly are something else. The Sámi ortoghaphy is not correct at all, I think in modern ortography it would be something like "Itpu baike/baška buollá dal, / Gal lie heittot, go it buollá". Maybe, idk Northern Sámi. Multilingual communities for the win.)
Only in Finnish (and this time Sámi!), sorry. This is the source material.