Assassin/Assassin Cross:
Twin Fangs [3] (Gotta double check when I wake up dead tired)

2-Hand Katar: ATK 140, DEF 3, +15AGI / +16 DEX, +12% more dmg with crits, +25% Dmg On Insect, Weight 150, 50% more dmg on Demi-Human types.
[Valk Combo] = +5% Resistance to Fire and Water, and +15% Resistance to Earth and Wind
[Myst Combo] = +15% Damage to Ghost, +50% Immunity to Stun, +10% Max HP.
Requirements:1 Infiltrator
1 Grimtooth
1 Assassin Mask
1 Hydra Card
1,000 Broken Shuriken
100 Elunium
40 Blade of Darkness25 Oridecon
135,000,000 Zeny
edit: the npc should be still on alberta, unless gms removed it
edit2: nope, npc is gone. they are a good souvenir though