At start of combat, the Sentinel with the highest Health gains a shield that grants Attack Speed each time it is applied. When the shield is destroyed or expires it will pass to the ally with the lowest percent Health.
3 200 Shield, 30% Attack Speed, 4 seconds
6 1000 Shield, 120% Attack Speed, 2 seconds
9 2000 Shield, 1000% Attack Speed, 1 second
Akshan Galio Irelia Lucian Olaf Pyke Rakan Senna