So Golems are immune to magic unless specified. So have this problem before me.
Carrion Golems have this listed under their stat block for "Immune to Magic" : Any magical attack that deals cold or fire damage slows a carrion golem (as the slow spell) for 2d6 rounds (no save).
Does this mean Fire and Cold damage spells actually do damage or is it just converted to a Slow effect?
Immune to Magic (Ex) A carrion golem is immune to any spell or spell-like ability that allows spell resistance. In addition, certain spells and effects function differently against the creature, as noted below.
Gentle repose causes a carrion golem to become stiff and helpless for 1d4 rounds if it fails a Will save against the spell.
Animate dead causes the various parts of the golem’s body to shudder and tear, dealing 1d6 points of damage per caster level to the golem (no save).
Any magical attack that deals cold or fire damage slows a carrion golem (as the slow spell) for 2d6 rounds (no save).
Any magical attack that deals electricity damage hastes a carrion golem (as the haste spell) for 2d6 rounds.
Hitting a carrion golem with a fireball has both of the following two effects on said golem:
1. nothing, since fireball allows spell resistance and the golem is immune to any spell that allows spell resistance; and
2. the golem is slowed for 2d6 rounds, as fireball is a magical attack that deals fire damage and such attacks slow carrion golems.
Note that a hypothetical irresistible fireball spell that did not allow spell resistance would both damage the golem and slow it.