Necromancer + Plagued

[Iudicium86]

Just curious. Since Necromancer is immune to all poison effects and damage, could he still attach a Plagued curse enchantment to himself to basically make himself a Mini-Malacoda, just never applying damage to himself and only to those around him?

Or does his immunity apply to the very concept of that card being a "poison" enchantment and therefore not a legal target for attachment to start?

[SirJasonCrage]

Immunity means you can't apply the enchant to it. You can't use the fire-barrier on Adramelech either, because it's a fire spell and he's fire immune