What does it mean by is immune to any spell that would alter it form?
Does magic missile affect or is it immune?
magical force - make a way through or into by physical strength; break open by force:
It could alter the form by breaking off chunks by the force of the spell
What does it mean by is immune to any spell that would alter it form?
Does magic missile affect or is it immune?
Yes, they have been getting progressively weaker in every edition. Old golems were immune to any spell that didn't otherwise have a unique effect on them (like stone to flesh making a stone golem squishy). In third edition, they were immune to anything that allowed a saving throw, which meant all evocations and no conjurations (so you couldn't throw a fireball at them, but you could throw an orb of fire at them).Then they weaken the golems from the older versions, but that is how I have been playing it, it is immune to only a few spells and advantage on saves