So be it

Off the wall question, but: Could someone tell me how you could say the
phrase "So be it" in PIE (by listing the PIE)? And would the formation be
limited to using an imperative or could you use a subjunctive form so that it
would mean something like "let it be so"?

Also, just wanted to add my own thought on the subject of PIE Sun Gods and
Goddesses:

I see two different solar deities in PIE religion. The first is a Sun God
proper that is a personification of the sun and related to the physical
object called the "sun". The second is a Sun Maiden that is not as directly
related to the sun as a physical object but is associated with the healing
powers of the sun sometimes in the form of water (thermal springs). This is
based mainly on Celtic and Balto-Slavic evidence, but also on Vedic evidence.
Just my 2 cents worth.

Chad Brown