As gragas, Gragas’s Ultimate R is very good in team fights. It deals a lot of damage and can displace the whole enemy team.

He has good sustain in lane (compared to many other champions) with his W. This will allow him to look for trades more frequently and heal back after a trade.

His E can be used in conjunction with Flash to get surprise trades/engages off with the enemy. He can also use it to interrupt abilities and enemy dashes. As gragas, Gragas' Ultimate R is very good in team fighting. It deals a lot of damage and can move the entire enemy team. It has good support in the way (compared to many other champions) with its W. This will allow it to look for jobs more frequently and heal after a job. Its E can be used in conjunction with Flash to get surprise jobs/commitments with the enemy. It can also use it to interrupt enemy abilities and dashes.