With a paternal heart

Pope Leo XIV, in a letter to the Superior General of the FSPX:

In this spirit, and filled with Christian affection, I plead with you and ask you with all my heart: please turn back! I urge you to consider carefully the spiritual good of the faithful, because the schismatic act you are about to undertake would deprive them of the licit and, in some cases, even valid reception of the Sacraments, which they love and seek for their sanctification.

In short: do not do this, please. Contrary to the phrasing in media reports, the penalty for illicitly ordaining a bishop is attached to the very act itself, automatically. No one will be excommunicated for this; they will excommunicate themselves by the simple act of doing it.

You don’t need to be a canonist to read the law, which states as plainly as possible:

Canon 1387. Both the Bishop who, without a pontifical mandate, consecrates a person a Bishop, and the one who receives the consecration from him, incur a latae sententiae excommunication reserved to the Apostolic See.

No nuance or emanating penumbras. Even a deacon can understand it.