Gain 3% extra MS. Gain extra AP or AD, based on your bonus MS, Adaptive.
Aftershock's massive defensive bonus allows you to trade aggressively in lane with your [Q] fear as well as helping you survive deep team-engage [R]'s into the enemy champions without dying before your team can follow up.
Bane Plating's early-game damage mitigation further empowers your ability to take aggressive lane trades while being able to heal off incoming damage.
Picking up the extra Ability Power from Chrysalis after getting a few kills/assists can make your mid-game teamfight engages with [R] extremely deadly.
Revitalize empowers the healing from your [W] allowing you to face-tank a considerable amount of damage in 2v2 trades.
Nimbus Cloak's synergy with your [R] offers you massive teamfight engage when combined wiht the extra movement speed from your passive.
Celerity's extra AP grants from movement speed, when combined with your passive and Nimbus Cloak, grants you a large amount of extra burst damage.