Maximum Movement Speed stacking and dive.
Burst damage and target access
Add an active effect to your boots that grants a large boost of MS and causes your next attack or spell to deal bonus adaptive damage.
Gain a burst of Lethality and Magic Penetration after using a dash, leap, blink, teleport, or on leaving stealth.
Takedowns on enemy wards cause friendly Zombie Wards to sprout from their corpses. In addition, damaging a champion after destroying a ward inflicts bonus magic damage.
Unique champion takedowns grant permanent out of combat MS.
+18 Ability Power or +11 Attack Damage, Adaptive
Gain 3% extra MS. Gain extra AP or AD, based on your bonus MS, Adaptive.
Gain MS and AP or AD, Adaptive when in the river.
Predator's active Movement Speed buff synergizes incredibly well with Hecarim's [E] and passive when looking to sprint into a lane for a gank.
The extra burst damage lets you get to and blow up your target.
Hecarim can proc Sudden Impact upon landing [E] or dashing with [R]. The bonus Lethalty allows you to assassinate squishies as you dive the backline.
Zombie Ward is a safe a reliable rune on every Jungle thanks to the nature of their vision control and ability to deep ward.
Relentless Hunter's Movement Speed grants you the freedom to quickly get to any fight or lane and synergizes well with Predator, Celerity, and Waterwalking.
Movement Speed means damage for Hecarim and Celerity doubles-down on that, empowering your passive, Predator, and Waterwalking.
The bonus Movement Speed granted while in the river double dips with Celerity and Hecarim's passive, allowing him to freely take early dragon and duel just about anyone.