Major changes are coming to Teamfight Tactics bag sizes with Set 12 Magic n' Mayhem. Starting with TFT Set 12, the live balance team has adjusted the bag sizes of one-, two-, and three-cost Magic n' Mayhem champions.
[TFT] Champion Pools explained in 60 seconds – TFT Quick Tips
A champion pool, or pocket size in TFT, determines how many one- to five-cost champions are available for purchase in the store during a lobby. This is especially important for Reroll compositions, and for players trying to two-star a higher-cost champion when contested. The intention behind the change, Riot told Dot Esports, is to even out the power distribution between cheap Reroll and fast Nine compositions.
These are the new bag size changes applied to TFT Set 12:
A big reason for the bag size increase is that Riot added a one-cost unit to the champion pool for TFT Set 12. Instead of 13, there are three 14 Tier One champions. To compensate for the bag changes, the power levels of Starred-up champions have been reduced slightly.
