i search a translation for a sentence for a tatoo

hi ! i want to translate a sentence for a tatoo and i wish it was perfect :)

can you help me please ?

the sentence is "the dragon's child will comme back when the primordial will tread the lands in search of its revenge"

you can say me if the grammar is not very good, i'm french and english is a bit difficult for me

thank you in advance

Category: Translation