Illaoi's core is her E (Test of Spirit) skill. Landing it determines the outcome of the laning phase, and opponents must prioritize dodging it, as its importance has grown after recent nerfs.
Illaoi is currently considered weak in the meta, especially after E duration nerfs reduced her combat effectiveness. Prudent play and careful skill usage are essential.
To counter Illaoi, dodge her E, clear her tentacles, pull the lane, and coordinate ganks when her E is on cooldown. High-mobility champions are advantageous, and using Phase Rush for hit-and-run tactics can be effective.