Does Magic Immunity protect against Illusions?

[occasionalplayer]

I am asking because I attacked a node with 5 Phantom beasts with 7 adamantium golems, each with 18 attack and eldritch weapon (obviously that doesn't matter much with phantoms but anyway). The beasts each had 20 attack and 2 defense, the usual node stuff. 
I thought I was going to win pretty easily because of my superior defense but failed miserably. They only managed to kill two beasts.

It felt like the golems were suffering from illusion attacks.
Maybe I was just extremely unlucky, but still wanted to check.

[Seravy]

I am asking because I attacked a node with 5 Phantom beasts with 7 adamantium golems, each with 18 attack and eldritch weapon (obviously that doesn't matter much with phantoms but anyway). The beasts each had 20 attack and 2 defense, the usual node stuff. 
I thought I was going to win pretty easily because of my superior defense but failed miserably. They only managed to kill two beasts.

It felt like the golems were suffering from illusion attacks.
Maybe I was just extremely unlucky, but still wanted to check.

No, Magic Immunity does not protect from Illusion attacks. Nor does it protect from Doom attacks. It does stop spells even if they do that type of damage, but not attacks.

[GermanJoey]

Only "Illusion Immunity" blocks Illusion attacks - see various undead, paladins, the Life spell True Sight, items with True Sight, etc. It's relatively common, as far as immunties go.

Steam cannons can easily crush Phantom Beasts, by the way.