As gragas, His engage and lockdown potential is really high due to his E and Q. Once he unlocks his Ultimate R, he can displace enemy champions to disadvantageous positions and get them killed instantly.

If he goes full AP, his burst damage is unreal, especially when he is fighting 1 v 1 against someone squishier. His W still provides him enough tankiness to not get popped immediately.

On catching someone out, he can get that enemy’s Flash with ease if he can’t translate it into a kill with his Ultimate R into Q and E combo. This is especially viable when Gragas is Jungling or when he is roaming around in the enemy Jungle as a laner. As gragas, His potential for engagement and locking is really high due to his E and Q. Once he unlocks his Ultimate R, he can move the enemy champions to disadvantageous positions and have them killed instantly. If he goes full AP, his burst damage is unreal, especially when he fights 1 v 1 against someone from squishier. His W still provides him with enough tankness to not get blown up immediately.