Xenoblade Chronicles 2 - How to unlock KOS-MOS Blade (100% Method)

Instructions are in the video. It is easier to follow them there but I will write them down as well. ---- 1) ---- Select Nia ---- 2) ---- Choose "Rare Core Crystal" ---- 3) ---- Have the following in your inventory: -1 Justice Boosters used (It's 3, but you'll be using 2, which brings it down to 1) -3 Bravery Boosters in inventory -1 Truth Booster in inventory -3 Compassion boosters in inventory ---- 4) ---- -Hold UP + A during the first ping ---- 5) ---- -Hold DOWN + B during the second ping ---- 6) ---- -Hold L + R (triggers) + UP during the third and final ping ---- NOTE: Courtesy of user Roxas Zero: Another way to guarantee the acquisition of KOS-MOS (which essentially is yet another 100% method). Nia ----------- Bravery 7 Truth 6 Compassion 6 Justice 6 Button combinations: The same as mentioned above (Roxas Zero made no mention of using a different button combination. It is safe to assume the original combination above was used).