Massive burst damage and empowered lane sustain.
Burst damage and target access
Hitting a champion with 3 separate attacks or abilities in 2s deals bonus adaptive damage.
Recover health when you damage an enemy champion.
Collect eyeballs for champion and ward takedowns. Gain permanent AD or AP, Adaptive for each eyeball plus bonus upon collection completion.
Heal for a percentage of damage dealt with your abilities. Increases with each unique takedown.
Creative tools and rule bending
Get a free biscuit every 3 minutes, until 12 minutes. Biscuits heal and permanently increase your max mana.
You get free boots at 10 min. but you cannot buy boots before then. These boots give additional MS. For each takedown you acquire the boots 30s sooner.
Like Thunderlords, Electrocute is a fantastic and reliable source of damage thanks to her semi-long range abilities and auto-attack range.
As Syndra you are easily able to proc Taste of Blood in lane while on the move, with [Q], without taking an damage. This easy proc helps sustain and out-trade enemies for lane dominance
Eyeball Collection is the go-to rune for snowballing a lead from a kill, especially on a champion like Syndra who can take over by one-shotting an enemy squishy.
Ravenous Hunter allows you to effectively trade in lane with constant harassment damage from [Q] while healing a bit in return.
Biscuit Delivery offers incredible lane sustain and the ability to constantly trade damage with the enemy while staying ahead of them
Magical Footwear is an all-around great rune choice as the gold efficiency is equivalent to a free kill in the early game.