Ceremony

1st-Level Abjuration (Ritual)
Casting Time: 1 hour
Range: Touch
Components: VSM($) (25 gp worth of powdered silver, which the spell consumes)
Duration: Instantaneous

As in Xanathar's Guide to Everything with the following changes:

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you may choose one additional target for each spell level above 1st.

Source: XGE 151

Changelog

Added upcasting option.