The Shared Champion Pool in TFT

One of the most important concepts in Teamfight Tactics is the shared champion pool. Unlike many games where every player has independent access to the same resources, TFT uses a single shared pool of champions for all eight players in a lobby. Understanding how this pool works is critical for making smart decisions about when to commit to a composition, when to pivot, and how to gain an edge through information.

How the Pool Works

At the start of every game, a fixed number of copies of each champion are placed into a shared pool. When any player buys a champion from their shop, that copy is removed from the pool. When a player sells a champion, it is returned to the pool. This means that every purchase and every sale by every player in the lobby directly affects what is available to everyone else.

The shop draws randomly from this shared pool when presenting you with champion options each round. If many copies of a particular champion have already been purchased by other players, you are less likely to see that champion in your shop.

Pool Sizes by Cost Tier

Each champion has a fixed number of copies in the pool, determined by its cost tier:

  • 1-cost champions: 22 copies of each
  • 2-cost champions: 20 copies of each
  • 3-cost champions: 17 copies of each
  • 4-cost champions: 10 copies of each
  • 5-cost champions: 9 copies of each

These numbers apply to each individual champion, not the cost tier as a whole. For example, if there are six different 1-cost champions in a set, there are 22 copies of each one, for a total of 132 one-cost champions in the pool.

The decreasing pool sizes at higher cost tiers reflect the rarity and power of those champions. With only 10 copies of a given 4-cost champion and 9 copies of a given 5-cost champion, competition for high-cost units is intense.

Contesting and Competition

When multiple players pursue the same champion or composition, they are said to be "contesting" each other. Contesting has real mechanical consequences:

  • Reduced availability: If three players are all buying the same 4-cost champion, only 10 copies exist in the pool. Each purchase makes it harder for the others to find copies.
  • Slower upgrades: Contesting means it takes more gold spent on rerolling to find the copies you need, delaying your power spikes.
  • Diminishing returns: The more players contest a champion, the worse the odds become for everyone involved. In extreme cases, it may become nearly impossible for any single player to 3-star a contested unit.

Eliminated Players Return Champions

When a player is eliminated from the game (their health reaches zero), all of their champions are immediately returned to the shared pool. This has several strategic implications:

  • Late-game availability: Champions that were locked up by eliminated players flood back into the pool, making them easier to find for surviving players.
  • Timing matters: If a player contesting your carry gets eliminated, your odds of finding copies suddenly improve.
  • 5-cost accessibility: In the late game, as players are eliminated and return their champions, 5-cost units become more available. This is why late-game rerolling at level 8 or 9 can sometimes yield surprisingly good results.

Scouting

Scouting refers to checking other players' boards to see what champions they are using. This information is freely available at any time by tabbing through the other boards. Effective scouting helps you:

  • Identify what's contested: If you see two other players building the same composition you want, you may want to pivot to something less contested.
  • Find open compositions: A composition that no one else is playing means the full pool of those champions is available to you, making upgrades faster and more reliable.
  • Predict availability: If you see an eliminated player had multiple copies of a champion you need, you know those copies just returned to the pool.

Strategic Implications

The shared pool system rewards flexibility and awareness:

  • Be willing to pivot: If you see your core champions are heavily contested, pivoting to a different composition that uses less-contested units can dramatically improve your consistency.
  • Play what's open: The concept of "playing what's open" means choosing a composition based on what is least contested in your lobby, not just what you planned before the game started.
  • Value information: Scouting is free and gives you a real competitive advantage. Players who scout regularly make better decisions about when to commit and when to change direction.
  • Understand the math: Knowing that only 10 copies of a 4-cost champion exist helps you assess whether chasing a 2-star is realistic. If you have 2 copies and you see 4 more across other boards, only 4 remain in the pool, and 2-starring is still achievable. If you see 7 across other boards, only 1 remains, and committing further is a gamble.

The shared pool is one of the features that makes TFT a deeply strategic game. It connects every player's decisions together and rewards those who pay attention to the broader state of the lobby.