Teamfight initiation, front-line tankiness, and target aquisition.
Durability and crowd control
After immobilizing an enemy champion gain defenses and later deal a burst of adaptive damage around you.
Impairing the movement of an enemy champion marks them. Your allies heal when attacking champion's you've marked.
After 10 minutes gain 8 Armor and 8 Magic Resist and increase your total Armor and Magic Resist by 5%.
Heals and shields are 5% stronger and increased by an additional 10% on targets below 40% health.
30-270 health (at levels 1-18)
Gain a free stopwatch. Stopwatch has a one time use Stasis active.
+5% Max CDR
+5% Summoner Spell CDR
+5% Item CDR
Aftershock is a fantastic keystone choice for Gragas because it provides him with the defenses needed in an engage, as well as a bit of extra offensive power with the explosion.
Gragas can very easily apply Font of Life to a large number of targets from his [Q], [E], and [R] results in a lot of healing in teamfights.
Gragas naturally builds a good amount of health and that health is multiplicative with every defensive stat he gets from Conditioning.
Revitalize synergizes incredibly well increasing the healing of both Gragas' passive and Font of Life healing.
The one-time stasis active from Stopwatch is pivotal in executing early tower dives that can grant your team a snowball lead.
Cosmic Insight's general utility empowers your ability to disrupt teamfights and find those perfect engages.