I don't think I like the concept of reaction spells which need material components. Where do they come from the moment you react to something? Is a reaction spell a good choice to get up to five creatures under the effect of the spell in a foreign environment? Do you believe you can see up to 60 feet submerged in some liquid to cast this spell?Buoyancy (Bard, Wizard, Cleric, Druid)
1st Level Transmutation
Casting Time: Reaction, which you can take any time your or an ally within range is submerged in water or some other liquid.
Range: 60 Feet
Components: V, S, M (a glass bubble filled with air, which the spell consumes)
Duration: 1 Minute
Choose up to five willing creatures within range that are completely submerged in water or another liquid. A submerged creature rises towards the surface at a rate of 60 feet per round. When it reaches the surface, it is sustained there, and can move under its own swimming speed, or moved by others (such as with a rope). The spell ends for a creature if that creature completely leaves the liquid.
I don't think I like the concept of reaction spells which need material components. Where do they come from the moment you react to something? Is a reaction spell a good choice to get up to five creatures under the effect of the spell in a foreign environment? Do you believe you can see up to 60 feet submerged in some liquid to cast this spell?
Then there is the point with a verbal component submerged in some liquid too.
I would change the spell either to somatic only, one target and reaction within 40 feet, or I would change the spell to one action without verbal component.