The message about the birthday came last night but I had already fallen asleep so I only saw it in the morning the next day.
[Happy birthday!]
[Boon obtained: That's Mental, Over, Unbreakable]
Oh wow, three boons this time eh?
[That's Mental] gives me resistance to mental forces trying to affect me. So if someone was trying to mind control me, it would be harder for them to do so.
Sure, my unique skill [Mind Shield] uses mana to protect my mind from external influences which may make this look redundant but it's an active skill while the boon is a passive.
So if I fail to activate the unique skill before I get affected, I would just simply go under the spell like what happens when I don't prepare before Delmare starts singing.
This boon should allow me to protect myself from the effects from taking root immediately and buy me time to activate my skill before I lose my mind so that's definitely good.