Oppressive lane pressure and ramping poke damage.
Empowered abilities and resource manipulation
Your attacks and abilities send Aery to a target, damaging or shielding allies.
Hitting enemy champions with a spell grants maximum mana.
After reaching 250 mana, Manaflow Band restores 1% of your missing mana every 5 seconds.
Gain 3% extra MS. Gain extra AP or AD, based on your bonus MS, Adaptive.
Gain increasing amounts of AD or AP, Adaptive over the course of the game.
+20 Ability Power or +12 Attack Damage, Adaptive
Gain a free stopwatch. Stopwatch has a one time use Stasis active.
Get a free biscuit every 3 minutes, until 12 minutes. Biscuits heal and permanently increase your max mana.
Aery is an especially good keystone pick on Heimerdinger primarily because your [Q] turrets and auto attacks allow you to repeatedly proc it for tons of ramping damage.
Manaflow Band's early game mana sustain is perfect for empowering your early laning phase harass to push your enemy out of lane and keep the pressure up.
Celerity synergizes well with Heimerdinger's passive. The extra movement speed you get while near your [Q] turrets will grant you additional Ability Power.
Gathering Storm allows you to massively scale into late game teamfights where you are able to completely take over with well-placed turrets and missiles.
Zhonya's is a key ingredient to Heimerdinger's arsenal of items and Perfect timing allows you to hit that item power spike before your enemy knows what hit 'em.
The early stasis also provides you the opportunity to potentially out-play an enemy jungle gank in a 1v2, if timed well.
Biscuit Delivery is Fantastic for empowering your laning phase sustain and poke with sustained mana. The extra regen is great for patching you up so you can trade often.