Bip44 Seed Phrase Generator. From this level ahead the seed may very well be composed on paper or spoken over phone and this opened up new, physical means of backing up the seed (several paper copies in different spots, resilient copies on metal plates with excess security from hearth/flood etc.). https://financefreedom16937.thebindingwiki.com/7794397/the_anatomy_of_a_bip39_phrase_entropy_phrases_and_stability