Tower unlocks at team level 15 and consists of 50 floors. You can find it on the main game screen:
Every day you can ascend to the very top of the Tower, battling various enemies and collecting team boosters and chests with rewards.
To participate in a battle in Tower, your heroes have to be level 15 or higher.
The main challenge of this game mode is to keep your heroes alive to reach the top of Tower. Note that the health and energy of both your heroes and opponents do not reset after combat. However, pets' energy goes back to zero after each battle.
Tower difficulty depends on your team level that you can find under your avatar on the main game screen. If your heroes' levels are below your team level, clearing Tower may become a challenge.
If heroes die in Tower, they do not get resurrected in the next fight. You can revive them by using skulls at certain Tower altars. Otherwise, you need to wait for the Tower reset at 05:00 AM your local time.
You receive Tower points and skulls for winning battles. You can either save skulls and exchange them for gold at the top of Tower or spend them on various buffs at Tower altars:
All purchased buffs are only active during the current day until the Tower reset at 05:00 AM your local time.
Earned Tower points are displayed in the bottom left corner of the Tower's screen. The more Tower points you earn, the bigger the reward you receive at the end of the day.
Click the counter of your Tower points to view possible rewards.
You can receive up to three stars for each battle. The more stars you get, the more skulls and tower points you earn. The number of stars you get at the end of a battle depends on how many heroes are left alive. If a hero dies, you lose one star. If two heroes die, you lose two stars. Three or four defeated heroes leave you with only one star.
Each battle you win grants you the ability to skip a battle on the next day. If you ascend to the top of Tower, you can skip floors 1-26. If you have not cleared Tower the day before, you can use emeralds to skip floors 1-26.
The ability to spend emeralds on skipping becomes available only if you have passed Tower to the 50th floor at least once.
Every three floors, you find three chests. Each contains either gold, Tower Coins, or random item fragments. Also, there is a slight chance that the number of Tower Coins you get will be doubled.
You can open one of the three chests for free, the other two can be opened for emeralds. You can open the third chest only if you are VIP 4 or higher.
When you reach VIP 6, you get +25% of gold from Tower chests. Starting from team level 80, chests contain 50% more gold.
The Tower raid option allows completing Tower instantly. It becomes available when you reach team level 130 and clear Tower up to the top floor at least once after that.