Massive burst damage and snowball potential.
Burst damage and target access
Hitting a champion with 3 separate attacks or abilities in 2s deals bonus adaptive damage.
Deals bonus true damage to enemies with impaired movement or actions.
Collect eyeballs for champion and ward takedowns. Gain permanent AD or AP, Adaptive for each eyeball plus bonus upon collection completion.
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.
Periodically your next ability used has its mana or energy cost refunded and restores some of your missing mana or energy.
Like Thunderlords, Electrocute is a fantastic and reliable source of damage thanks to her semi-long range abilities and auto-attack range.
Between the Stun from your [E] and slow from [W] you're able to reliably harrass with true damage from Cheap Shot.
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.
Relentless Hunter's extra Movement Speed allows you to roam to side lanes to make picks and get to fights that break out across the map.
Celerity's Bonus Movement Speed, like Relentless Hunter, helps you roam for picks but it also plays a big part in improving your mid-fight positioning.
Manaflow Band offers you great lane sustain so that you can keep the pressure up with poke damage ot find that all in with [R].