Summon Calculator
Luck and passes- Luck
- x1
- 100 summons cost
9,000- Shiny chance
- 1 in 100
- A Shiny in 100
- 63.4%
Luck doubles every slot under 10% once per doubling, never past 10%, and takes the difference out of Common. The pass and the potion stack to x4.
Secret0.01% a summon (1 in 10,000)Average wait 10,000 summons, 90% by 23,025. Shiny Secret: 1 in 1,000,000. One of 2: Prism, Titan.1%in 100
Mythic0.1% a summon (1 in 1,000), guaranteed by summon 1,000Average wait 632 summons, 90% by 1,000. Shiny Mythic: 1 in 100,000. One of 3: Void, Minigunner, Nuke.9.52%in 100
Legendary1% a summon (1 in 100), guaranteed by summon 100Average wait 63 summons, 90% by 100. Shiny Legendary: 1 in 10,000. One of 6: Fire, Moon, Sun, Dragoness, Assassin, Bomb.100%in 100
Epic4% a summon (1 in 25)Average wait 25 summons, 90% by 57. Shiny Epic: 1 in 2,500. One of 6: Ice, Storm, Magma, Spirit, Gold, Boulder.98.3%in 100
Rare15% a summon (1 in 7)Average wait 6.7 summons, 90% by 15. Shiny Rare: 1 in 667. One of 3: Wind, Rock, Shadow.100%in 100
Uncommon30% a summon (1 in 3)Average wait 3.3 summons, 90% by 7. Shiny Uncommon: 1 in 333. One of 3: Earth, Thorn, Lightning.100%in 100
Common49.9% a summon (1 in 2)Average wait 2 summons, 90% by 4. Shiny Common: 1 in 200. One of 4: Leaf, Water, Cloud, Mushroom.100%in 100
Where the odds come from
The base table and the pity counters are the game's own summon settings, and luck runs the game's summonOdds: each slot under 10% doubles once per luck doubling and stops at 10%. The Secret slot (0.01%) is taken out of Common. Which dragon a slot holds this hour is on the Summon board.
Lucky Summon odds
| Rarity | 10x luck | 20x luck | 50x luck |
|---|---|---|---|
| Secret | 0.1% | 0.2% | 0.5% |
| Mythic | 1% | 2% | 5% |
| Legendary | 10% | 20% | 50% |
| Epic | 40% | 77.8% | 44.5% |
| Rare | 48.9% | 0% | 0% |
| Uncommon | 0% | 0% | 0% |
| Common | 0% | 0% | 0% |
Questions
What are the summon odds in Dragon Tower Defense?
Common 49.89%, Uncommon 30%, Rare 15%, Epic 4%, Legendary 1%, Mythic 0.1%, Secret 0.01%. The rarity is rolled first; the dragon is whichever one the Summon board holds in that slot this hour.
How does pity work?
Two counters run on your summons. You're guaranteed a Legendary by summon 100 since your last one and a Mythic by summon 1,000. With them, a Legendary takes 63 summons on average and a Mythic 632. Secret has no pity.
What does luck do?
The 2x Luck pass and the Luck Potion each double the chance of every slot under 10%, capped at 10%. With both, Epic goes from 4% to 10%, Legendary from 1% to 4% and Secret from 0.01% to 0.04%. Common gives up the difference.
How rare is a Secret dragon?
0.01% a summon, 1 in 10,000. With x4 luck that's 1 in 2,500. At 900 Coins per ten summons, the average Secret costs about 900,000 Coins with no luck.
What is a Lucky Summon?
A prize from Endless waves, the battle pass and the Endless Shop that multiplies every chance instead of doubling under 10%. At 10x luck it gives Secret 0.1%, Mythic 1%, Legendary 10%, Epic 40%, Rare 48.9%; at 20x it's always Epic or better.
