Bip39 Passphrase List. From this stage forward the seed might be composed on paper or spoken around phone and this opened up new, Actual physical ways of backing up the seed (many paper copies in several spots, durable copies on steel plates with extra safety from fireplace/flood and so forth.). https://johnathanlwgrc.wikissl.com/1108550/the_anatomy_of_the_bip39_phrase_entropy_text_and_protection