
Where should we look for new excitement when it's difficult to get through prison
To challenge the model – the greater difficulty of the tower’s defense, where opponents can choose different adhesives to make the game more difficult for the authorities, corresponding to the high returns of a mythical prop and a high-level trap。
What is a “challenge model”
The challenge model is a more difficult game that is unique to the tower and that requires a purgatory to unlock。
Under this game, a “challenging word” option will be introduced based on the difficulty of penetrating prisons, and the counter-walkers will be able to add their own challenge word to the challenge, adding greater difficulty to the tower's defence journey and experiencing higher intensity challenges than normal towers' defences, with incentives enriched as the difficulty increases。
If you want to challenge the limits of your towers against skill, you can come here and try。
2 core mechanism: challenge letter

The challenge word, the negative state you add to the authorities ' game or the increase in the monster, can add up to 10 challenge words to a game, and the more the selected challenge word drops, the higher the difficulty factor. In order to adapt to this difficulty, it is not possible to fill the challenge directly in the first contact, and you need to start by challenging three challenge phrases, followed by five, then eight, then 10; if you find it too difficult, one, two, and three can be scaled up。
Why the challenge mode
For you, perhaps the ordinary purgatory hardship award is no longer sufficient。
The probability of the fall of the reward rises with the challenge adhesion, and nothing is more obvious than the legendary gun, exclusive close-to-war weapon and tower-proof high-level trap; if you want to grow your own technology tree, it is better to draw the technology points here than the normal purgatory model。
4 technology trees and backbrush policy
The added effect of the technology tree is only “challenged” and can be understood as central to reducing the challenge。

The challenge of customs clearance requires the ability of individuals to understand and, if not, to enhance their self-hardness by nurturing a technology tree。
Technological points can be obtained through repeated extraction of the difficulty of purgatory, which can be used to raise the level of the technology tree, unlock the different additions, and thus respond more easily to the challenge, while the low-challenging phrases can be followed by low-challenging textures, thicker hairs, and more difficult by one footprint。
5 concluding remarks
The model of the challenge is a manifestation of the greater difficulty of the game-proof approach of war respond: the future, the rational use of challenge words to raise the difficulty, the challenge of self-capturing while reaping rewards, and the accumulation of game understanding, which is a necessary road to the great god。




