Teemo

Arena changes

• Q: Base damage changed to 70 to 230.
• Q: AP ratio changed to 70% AP.
• Q: Blind duration changed to 1.5 to 2.5 seconds.
• R: Total base damage changed to 150 to 350 3.
• R: Total AP ratio changed to 45% AP.
• R: Slow strength changed to 20 to 40 3%.²

• Teemo's darts can upgrade as he hits opponents, and his poison can start a combo or add damage during one.³
• Shrooms can be set up ahead of a fight around Baron.⁴
• With Trueshot Prodigy and other long-range effects such as Diamond-Tipped Spear, staying back and letting opponents run into mushrooms can help the team win fights.⁵

• One Noxious Trap can trigger Ethereal Weapon twice; at max level, one trap can produce six on-hits.⁶
• Ethereal Weapon can greatly increase shroom damage with AP investment.⁷
• With Chauffeur, Teemo's W movement-speed bonus does not transfer to the ally carrying him; movement speed from Giant Slayer or Tap Dancer also does not transfer.⁸
• Twice Thrice does not work on Teemo's E.⁹¹⁰
• Teemo's E on-hit effect and the poison parts of E and R do not crit with Jeweled Gauntlet.¹¹
• Teemo's E does not deal spell damage, so it does not trigger Jeweled Gauntlet or Liandry's.¹²
• Serpent's Fang can reduce shields applied by Shen, Yone, Jarvan IV, and Lulu when Teemo buys it.¹³

• Diamond-Tipped Spear's tooltip can show very little damage for Teemo at the end of the game.¹⁴
• ADAPt may not change Teemo's AP and AD as expected after Bloodthirster is selected.¹⁵
• Fulmination may deal no damage on Teemo.¹⁶
• Upgrade Collector may grant only one stack per kill and no bonus gold for Teemo, even when its displayed level is two stars.¹⁷

• Since patch 26.21, Teemo's Toxic Shot initial hit attack damage ratio is 10%, and its damage-over-time attack damage ratio is 20%.¹⁸
• In the eight-teams-of-two format, a Fulmination, Statikk Shiv, and on-hit or attack-speed build could work for Teemo, with Energizer, Twice Thrice, Dual Wield, or ADAPt augments adding synergy.¹⁹ Earlier Arena format

Earlier formats

• Teemo, Singed, or Twitch poison could enable Cassiopeia's E against a poisoned target.²⁰ 8x2 duos
• Jeweled Gauntlet activated on Teemo's Q and the initial burst of Noxious Trap, but not on poison damage.²¹ 8x2 duos
• When Teemo's augment was on Aurelion Sol with LeBlanc's guest effect, the augment could not be used. Turning Q off and on again restored movement, but could cost the Teemo passive.²² 8x2 duos
• Teemo's passive activation and deactivation visual effects did not appear correctly; this was fixed in patch 13.14.²³ 4x2 duos