Deathbed Blessing

Unleash a continuous empowering aura from your body using all but the necessary energy in your body to keep you alive. When cast, the caster is immediately downed, suffers no injury,  and is stabilized at 0 hitpoints. Until the caster is brought back to at least 1 hitpoint, all allies within 30ft of the caster add the caster's spell attack modifier (spell ability score modifier + proficiency modifier) to all their attack rolls and saving throws.