Eternal Pact: TFT Set 18 artifact
Eternal Pact is an artifact in TFT Set 18. On our item tier list it is A tier. Nerfed in 18.3; still a strong artifact, a step behind the best in 18.4 games.
What Eternal Pact does
Combat start: Form a pact with the highest Health allied champion, if they die, gain 10 Mana regen and 40% Ability Power. When the ally uses their ability, gain 15 Mana. Every 6 seconds, shield your ally for 200% of the holder's Ability Power.
From Riot's game data; the exact numbers can change between patches.
See where Eternal Pact sits against every other item on the item tier list.