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The shop is the interface in Dota Underlords where heroes may be purchased.
Buying heroes
The shop contains 5 heroes for players to purchase with gold. Each hero in the shop is priced accordingly to their tier. Tier One heroes cost 1 gold, Tier Two heroes cost 2 gold, and so on. Ace heroes cost 5 gold.
The shop can be accessed and purchased from at any time. All units purchased from the shop are Level 1.
Re-rolling
Gold can be used to re-roll the shop. When you re-roll, the shop refills all its slots with new heroes, any hero left in the shop will be replaced. The shop refreshes automatically at the start of each preparation phase and can be refreshed (re-rolled) manually by the player for 2 gold. A free re-roll of the shop is also granted after a combat loss to an opposing player.
Blacklisting
Whenever you manually re-roll the shop, any heroes left in the shop from the previous refresh are blacklisted: those heroes are prevented from appearing in any slots of the refreshed shop. This mechanic can be used to increase the odds of seeing desirable heroes, by removing the possibility of getting undesireable heroes.
Automatic refreshes of the shop at the start of each preparation phase can show unpurchased heroes from the previous shop.
Shop odds
The current Player Level determines the odds of finding a certain tier of hero in the shop. Each of the 5 slots in the shop is assigned a hero tier using the tier odds for each Player Level:
| Player Level | Tier One | Tier Two | Tier Three | Tier Four | Ace |
|---|---|---|---|---|---|
| Level 1 | 100% | ||||
| Level 2 | 70% | 30% | |||
| Level 3 | 60% | 35% | 5% | ||
| Level 4 | 50% | 35% | 15% | ||
| Level 5 | 40% | 35% | 25% | ||
| Level 6 | 30% | 30% | 30% | 10% | |
| Level 7 | 25% | 30% | 30% | 15% | |
| Level 8 | 22% | 27% | 30% | 20% | 1% |
| Level 9 | 20% | 23% | 29% | 25% | 3% |
| Level 10 | 15% | 21% | 28% | 30% | 6% |
Level 10 with  A Higher Class of Criminal |
15% | 20% | 25% | 30% | 10% |
The odds of seeing a particular hero in the shop are also determined by the number of copies of that hero remaining in the Heroes Pool, and the number of copies of all other heroes of that same tier in the pool. The choice is random from all the copies of heroes at that tier, with each copy of heroes weighted equally. For example, the chance to get an Arc Warden in a Tier Four slot, when there are currently 5 Arc Wardens owned by players, and all the 20 copies of the other 11 Tier Four heroes are still in the pool, is 6.4% (15 / (11 * 20 + 15)).
These two sets of odds are applied as follows, independently for each of the 5 slots in the shop:
- choose a tier for the slot, using the current Player Level and the odds chart above
- choose a hero randomly from all the copies of heroes at that tier currently in the Heroes Pool
Ace Tier Odds
The odds of seeing a particular Ace hero in the shop can be affected by having the Ace hero's alliance enabled. The odds are affected when the alliance is enabled by either heroes on the board, or heroes on the bench. Only one level of the alliance is required.
When an Ace unit is chosen for a slot in the shop, the odds of it being the Ace unit associated with an enabled alliance is increased by 15%. This has the following effect on the application of the odds to for a slot in the shop:
- choose a tier for the slot, using the current Player Level and the odds chart above
- choose a hero randomly from all the copies of heroes at that tier currently in the Heroes Pool
- if the Ace tier is chosen, apply a 15% chance to replace the chosen Ace hero for each enabled alliance
For example, once a slot is chosen to be Ace, and assuming that all 10 copies of each of the 7 Ace heroes is still in the hero pool:
- if no Ace alliances are enabled, the chance of a particular hero being chosen for that slot is 14.29% (1 in 7)
- if only the Warlock
alliance is enabled, the chance of 
Disruptor being chosen is increased to 27.14%, while the chance of any other Ace hero is decreased to 12.14%. - if both the Warlock and Shaman
alliances are enabled, the chances of Disruptor and 
Enigma being chosen are both increased to 25%, while the chance of any other Ace hero is decreased to 10%.
Items
The following items affect the shop in some way:
- A Higher Class of Criminal — Units in shop offered as if you were 1 level higher.
Friends and Family Discount — All units are 1 gold cheaper.
Change logs
- Aces
- When at least one level of that alliance is enabled, when an Ace unit appears in the shop, the odds of it being the Ace unit associated with that alliance is increased by 15%.
- Oh and our hero odds changed one more time:
| Tier One | Tier Two | Tier Three | Tier Four | Ace | |
|---|---|---|---|---|---|
| 1 | 100% | ||||
| 2 | 70% | 30% | |||
| 3 | 60% | 35% | 5% | ||
| 4 | 50% | 35% | 15% | ||
| 5 | 40% | 35% | 25% | ||
| 6 | 30% | 30% | 30% | 10% | |
| 7 | 25% | 30% | 30% | 15% | |
| 8 | 22% | 27% | 30% | 20% | 1% |
| 9 | 20% | 23% | 29% | 25% | 3% |
| 10 | 15% | 21% | 28% | 30% | 6% |
| 10+ | 15% | 20% | 25% | 30% | 10% |
| 10+ can be achieved when a player is at level 10 and using A Higher Class of Criminal item
| |||||
- hotfix to further adjust the odds of getting Tier Four and Tier Five units at higher levels:
| Tier One | Tier Two | Tier Three | Tier Four | Tier Five | |
|---|---|---|---|---|---|
| 1 | 100% | ||||
| 2 | 70% | 30% | |||
| 3 | 60% | 35% | 5% | ||
| 4 | 50% | 35% | 15% | ||
| 5 | 40% | 35% | 25% | ||
| 6 | 30% | 30% | 30% | 10% | |
| 7 | 25% | 30% | 30% | 15% | |
| 8 | 23% | 27% | 30% | 20% | |
| 9 | 20% | 25% | 28% | 25% | 2% |
| 10 | 17% | 22% | 28% | 30% | 3% |
| 10+ | 15% | 22% | 28% | 30% | 5% |
| 10+ can be achieved when a player is at level 10 and using A Higher Class of Criminal item
| |||||
- Increased Tier Four hero pool to 20 per hero.
- XP is now given before the shop refreshes at the start of the round. If you gain a level at the end of a round, your shop for the next round is now based off that new level.
- Shop refreshes no longer use the blacklist mechanic. Only user-initiated shop refreshes (i.e. rerolls, free and paid) use the blacklist mechanic.
- Adjusted hero tier distribution curves. Tier Four and Tier Five pieces are somewhat more common at high levels:
| Tier One | Tier Two | Tier Three | Tier Four | Tier Five | |
|---|---|---|---|---|---|
| 1 | 100% | ||||
| 2 | 70% | 30% | |||
| 3 | 60% | 35% | 5% | ||
| 4 | 50% | 35% | 15% | ||
| 5 | 40% | 35% | 25% | ||
| 6 | 30% | 30% | 30% | 10% | |
| 7 | 25% | 30% | 30% | 15% | |
| 8 | 20% | 25% | 30% | 20% | 5% |
| 9 | 18% | 20% | 25% | 30% | 7% |
| 10 | 15% | 20% | 25% | 30% | 10% |
| 10+ | 10% | 20% | 25% | 30% | 15% |
| 10+ can be achieved when a player is at level 10 and using A Higher Class of Criminal item
| |||||
- Spectators can now see the shop of players from the same party that they started the match with
- You won't see heroes from the previous shop whenever you re-roll the shop.
- Adjusted shop reroll mechanic to mitigate duplicates.