Creature with Immunity to Fire is hit by Contagion spell, is it vulnerable to fire?

Can you use the healer’s kit to stabilize a PC if you don’t have the Medicine skill prof?

If a creature is lit by Faire Fire and a rogue has advantage…

Should the melee spell attack made to attack with a spiritual weapon be considered a weapon attack?

Are prayers intercepted/granted by Strahd/Dark Powers?