Expanded Champion Pool
One of the downsides of TFT Season 11 was the lack of reroll compositions. Only a few compositions like Yone, Alune, and Janna reroll managed to carve out a niche in the meta where 4-cost champions were overwhelmingly strong. The main reason for this was Riot’s reduction of the champion pool for units priced 1 to 3 in Season 11, making it significantly harder to reroll these characters to 3 stars compared to before.

However, this will completely change in Season 12 as Riot expands the champion pool for these units. Specifically, the maximum number of 1-cost units has been raised to 30, while the numbers for 2-cost and 3-cost champions are now 25 and 18, respectively. This will significantly increase the chances of upgrading 1-3 cost champions to 3 stars and give them a more stable position in TFT Season 12.
Experience Leveling Changes
In TFT, reaching levels 8 and 9 is extremely important as they have a high appearance rate for 4 and 5-cost champions. This helps players acquire key units to complete their compositions and achieve maximum power. However, reaching these milestones is not easy when players need to spend up to 80 gold to reach level 8 and level 9.

In Season 12, this number has been reduced to 76, allowing players to accelerate their progress towards these important level milestones. It should be noted that in TFT Season 12, Riot has introduced the Charms mechanism with many tools to increase gold and experience. Combined with changes to experience metrics, even reroll compositions will have enough resources to reach high level thresholds and have powerful 5-cost champions like Smolder, Norra, Briar…
“New” Energy Mechanism
Energy has always been a pretty “headache” issue for Riot Games. Even the project director for TFT – Riot Mortdog, once mentioned that he intended to completely remove the energy mechanism to make balancing the game easier. However, Riot chose a different approach by upgrading the energy regeneration mechanism in TFT Season 12.

Specifically, any excess energy after a champion uses their ability will now be retained instead of being lost as before. This promises to make magic damage champion groups extremely powerful as they will no longer suffer energy disadvantages. This change might also allow the Shojin Spear to rise in prominence and become a core item for numerous champions.