Abilities
Pix fires homing bolts at Lulu's attack target, which can be blocked by other units.
Lulu and Pix fire bolts that damage and heavily slow all enemies hit.
Polymorphs an enemy to silence and disarm them, or buffs an ally with move and attack speed.
Lulu sends Pix to shield an ally or damage an enemy, then follows them.
Lulu enlarges an ally, knocking up nearby enemies and granting bonus health with a slowing aura.
Guide
Play as a backline enchanter, peeling for your carries with shields, polymorphs, and knock-ups while using your slow to control chokepoints.
Tips
Use Whimsy (W) on allies to boost their attack speed or on enemies to polymorph them in fights.
Save your ultimate, Wild Growth, to peel for your carry or disrupt enemy engages.
Position behind your frontline to safely apply Pix (passive) and shield with Help, Pix! (E).
In ARAM, prioritize ability haste items to spam your shields and polymorphs.
Use Glitterlance (Q) to slow multiple enemies in narrow Howling Abyss corridors.
Combos
E > Q: Shield an ally or damage an enemy, then slow with Glitterlance.
W > R: Polymorph a diving enemy, then ult your carry to knock them up.
Q > E: Slow enemies first to land your Pix-enhanced auto attacks safely.