今に
いまに · imani · JLPT N3 · adverb
before long
⏳ 今 now + に toward = heading into now, so any moment now
Literally toward now: the future is about to arrive in the present. It is common in 今にわかる (you will understand before long) and 今に見ていろ (just you wait), so it often carries a sense of something that is bound to happen.