Lillia vs Briar Jungle Matchup
Lillia Jungle wins 49.3% of 2,786 Low Elo games against Briar Jungle, -0.3 points vs expected, 2-patch window 26.19-26.20.
Researched on LoL patch 26.20. Tips are written to hold at any rank; stats come from Low Elo ranked games up to patch 26.20.
How to play as Lillia
Use Blooming Blows(Q) speed and Swirlseed(E) slow to kite Briar toward your team instead of taking a stationary duel; your sleep is strongest when Briar has committed to a chase.
Lillia's Blooming Blows(Q) grants stacking movement speed and Swirlseed(E) slows, letting her kite Briar's close-range Blood Frenzy(W); Briar's Head Rush(Q) stun and Certain Death(R) can instead lock Lillia down when Briar reaches her.
Briar's healing from Crimson Curse(P) and Snack Attack(W) makes a short burst less decisive if Lillia stays within reach and lets Briar keep attacking.
How to play as Briar
Look for the fight before Lillia has several items and use Blood Frenzy(W) plus Head Rush(Q) to close the gap; don't follow her around a corner into a teammate who can help her kite and sleep you.
Sources
These notes come from r/BriarMains, checked against the champions' abilities.