How to Beat Wyvern
The Wyvern fight is similar to those with flying enemies (such as the Griffin) we’ve encountered earlier in the game. Fortunately, it acts in much the same way as the aforementioned monsters and as such the tactics remain essentially the same.
Whilst it does have wings, for the most part it will attack from the ground and has quite a large area of attack due to its wings being able to perform sweeping moves. In addition to its close range wing attacks, it can also jump in the air and leap attack at your position as well as utilising a nasty lunge attack, which you can roll under if timed correctly. Similar to the Basilisk it is able to spit green projectiles at you which will poison Geralt if it makes contact. When it is in the air, it will try a swooping attack that can be easily rolled under/away from but will hit like a tonne of bricks if not avoided.
The easiest way to take it down quickly is to use a combination of AXII to stun it, IGNI and AARD to dish out damage or YRDEN to slow its movements to get a few attacks in. Whilst in the air, hit it with crossbow bolts or AARD to bring it crashing to the ground – run up and smash it a few times and then use your dodges and rolls to avoid its ground-based attacks whilst dishing out your own attacks when you see an opening. A Repeat this process until it hits the dust.