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The Loop (Games)
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"Tupi technique for envenoming arrowheads. Archer attack increased."—In-game description
Tupi Poison Arrow Frogs is a technology in Age of Empires III that can be researched at a Trading Post built on a Tupi settlement. Once researched, it increases the attack of archers by 10%.
Strategy 
Edit
Tupi Poison Arrow Frogs are useful when stacked with other archer damage upgrades and Home City Cards, with the Japanese Ikko-Ikki benefits from this technology.
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