Hecarim
Off to the Races
Lane harassment and consistent damage output.
- Predator
Add an active effect to your boots that grants a large boost of
MS and causes your next attack or ability to deal bonusadaptive damage . 
Sudden ImpactDamaging basic attacks and abilities deal bonus true damage to enemy champions after using a dash, leap, blink, teleport, or when leaving stealth.
Grisly MementosCollect 1 memento on champion
takedowns , up to 18 total.
Gain 6 Trinket Haste for each collected.
Relentless HunterUnique
takedowns grant permanent out of combatMS .
Sorcery
Empowered abilities and resource manipulation
CelerityAll
Move Speed bonuses are 7% more effective on you and gain1% Move Speed .
WaterwalkingGain
MS and AP or AD,adaptive in the river.
Adaptive Force
+9
Adaptive Force Adaptive Force
+9
Adaptive Force 
Health Scaling
+10-180 Health (based on level)
Why Predator
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.
Why Sudden Impact
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.
Why Grisly Mementos
Grisly Mementos is a safe a reliable rune on every Jungle thanks to the nature of their vision control and ability to deep ward.
Why Relentless Hunter
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.
WhyCelerity
Movement Speed means damage for Hecarim and Celerity doubles-down on that, empowering your passive, Predator, and Waterwalking.
WhyWaterwalking
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.