Missing masks

[DV2-Maggot BONKer]

I have 41 of the supposed 43 masks created (It has the "Done" check even tho some masks are now marked at 0 quantity) yet the game only lists me 41 of em done, with the last one being

Note that i have only 1 Archetype to do, wich is Heismay's last of the Assassin (Because certain guide doesn't explains things too well...), but let me guess: Once i do Heismay's Study (Or LVL 20?) i'll be able to get the 43th mask later?.. And if so, what are the ingredients?

The ones i have, in order of appearing at the AKADEMIA, are:

Seeker
Magic Seeker
Soul Hacker
MAge's Mask
Wizard's Mask
Elementalist Mask
Warlock
Warrior
Swordmaster
Samurai
Mage Knight
Paladin
Dark Knight
Brawler
Pugilist
Martial Artist
Healer
Cleric
Saviour
Gunner
Sniper
Dragoon
Thief
Assassin
Faker
Trickster
Commander
General
Warlord
Merchant
Tycoon
Summoner
Devil Summoner
Berserker
Destrroyer
Dancer
Mend
Mind
Muscle
Mercy

[HayateButler]

You can find all the Mask Experiments in this guide if you navigate to the Mask List & Experiment Materials section. If I remember correctly, you just need to meet the Follower Bond Requirements to be able to craft their masks.
https://steamcommunity.com/sharedfiles/filedetails/?id=3346632862

[DV2-Maggot BONKer]

Seems like i just needed the Ninja mask...And the trophy popped up

One of the worst trophies finally done... And Will got all Archetypes to 20.. Now i just need Heismay to RANK 8. I take you're forced to fly somewhere to talk to him up?

[HayateButler]

Yes. For Heismay Follower Bond Rank 8, you need to be traveling on the Gauntlet Runner.

[DV2-Maggot BONKer]

Got it. In the end i think it was 42 masks but... Meh, ATLUS being ATLUS...Got the masks trophy at last. Thanks!