For “players” in Teamfight Tactics, many might have “memorized” the champion appearance rates at each level, the number of champions in the champion pool, the appearance rate of champions in each level, etc. But there is a special hidden mechanism about champions that few people know, which has recently been shared by the community. If you utilize this mechanism properly at the right time, you will gain a significant advantage in the game:

First of all, to talk about the advantages of this hidden mechanism, many people often level up to level 4 or 5 early to increase the appearance rate of 3 and 4-cost champions. However, there is a special hidden mechanism that few people know about: you are guaranteed to receive at least 1 champion by round 2-2. Therefore, if you haven’t seen any champions appear before then, you can level up to 4 to increase your chances of seeing 2-cost champions.

Additionally, another hidden mechanism is that you are guaranteed to see at least 3 champions until the end of the Stone Golem round (2-7). Therefore, many have devised a rather bold strategy of locking the shop continuously if they don’t see any champions after the first monster round (1-2). Then, you will unlock the shop again before the shopping round (2-4), and you will have a 100% chance of seeing 3 champions consecutively from round 2-5 to 2-7 (at this point, you need to level up to 5 to find 3-cost champions).
This playstyle will cost you quite a bit of health at the beginning (due to locking the shop right from 1-2) but will give you a high chance of acquiring a 3-cost champion that can carry. Note that if you buy and then sell a champion, this mechanism will not count.
