I'm running a 5th edition campaign that's going well. I'm not very versed in the system just yet, and my group has run into a little bit of a bind – it's not game-breaking, but it tends to come up every now and then and I just want to be sure.
Is it possible for the cleric in the party to create holy water?
As stated, Bless can only be used on creatures. Is there a way for a player to bless water?
Xanathar's Guide to Everything has a 1st level cleric and paladin spell called Ceremony, which has a number of various options which correspond to things which have traditionally been sacraments of the church in the real world — weddings, funerals, coming of age ceremonies, atonement, and etc. One of these options is:
This spell has a casting time of one hour and every option requires 25 gp worth of powdered silver, which the spell consumes.
This corresponds perfectly with the "special ritual" described in the basic rules, under holy water, which:
So, while @sadaqah's answer is correct pre-Xanathar's, it seems that they've decided to fill in this missing space with a specific spell.