You start out with the
Aqesiro which provides your passive abilities,
Warp-strike [
R1 +
X ] and
Warp-dodge [
L1 +
O ]. These can be used whenever you want, and
Warp-strike is actually taught to you in the tutorial section at the start, but isn't actually a part of Noct's regular abilities.
Warp-dodge is a form of evasion that more veteran players will appreciate using that functions as a normal dodge move that can avoid attacks. It's very useful to trigger your Counter weapon strike as well as general dodging as it provides the invincibility frames that regular dodging uses while allowing you to move in whatever direction you use it in.
As for what you will see people activate as "
Armiger" (meaning arms bearer) which is triggered with [
L1 +
R1 ] is acquired from your first found phantom sword. This weapon is called
Secace and will allow you to engage
Knightswords with the aforementioned button combo. This is likely what you're referring to and what has been seen in past trailers.
You also get
Galatine which supposedly gives you the power of the
Knightshield which is activated by [ Hold
L1 ] but I actually don't know how it works. It doesn't seem to provide anything different than your standard guard... if someone understands how this works, please let me know.
Lastly is
Rhongomyniad which provides a passive ability of
Knightsguard, simply press [
L1 ] when you are hit and you will recover from the attack. Think of it like when you get hit by a large enemy, you fall
down and need to get back up. Using
Knightsguard allows you to recover from the attack. What's interesting about
Knightsguard, is that you will actually take the damage from the hit, but then recover it on successful guard.
If someone knows how the fuck
Galatine works, please let me know...