Luck and what it actually changes
Luck is one number and the game shows it to you as a letter. At zero Luck you roll the published base odds and nothing else. Every potion, pass, research level and tree node you own adds points to the same pool, and a hatch reads that pool.
The number is written as a percentage, but it is not a percentage of your rarity odds. Plus 500 Luck does not make a Legendary five hundred times more likely. The points feed a curve, and the curve decides how often a hatch climbs one rarity step.
What your Luck does to one hatch
Base odds (before any luck bonus)
| Rarity | Chance |
|---|---|
| Common | 50.0525% |
| Uncommon | 34% |
| Rare | 12.5% |
| Epic | 2.7% |
| Legendary | 0.7% |
| Mythical | 0.045% |
| Secret | 0.0025% |
Total luck bonus: 0 points
Reading the calculator
The panel above takes one number, your total Luck in points, and shows what a single hatch looks like at that number. Slide it and the seven rarity chances move together: the common end gives ground and the rare end takes it, one step at a time.
The early climb is steep and it flattens later, so the first few hundred points are the ones you feel. The order never inverts. Common stays at least as likely as Uncommon at every value on the slider.
The Luck grade ladder
The letter is a label on top of the number, so two accounts with the same letter can still be a hundred points apart inside the band. A player running a Luck pass with a maxed research ladder is sitting on several hundred points.
| Grade | Total Luck in points |
|---|---|
| F | 0 to 19 |
| D- | 20 to 49 |
| D | 50 to 99 |
| D+ | 100 to 199 |
| C- | 200 to 299 |
| C | 300 to 399 |
| C+ | 400 to 499 |
| B- | 500 to 599 |
| B | 600 to 699 |
| B+ | 700 to 749 |
| A- | 750 to 799 |
| A | 800 to 849 |
| A+ | 850 to 899 |
| S | 900 to 1,499 |
| S+ | 1,500 to 2,499 |
| SS | 2,500 to 3,499 |
| SSS | 3,500 to 4,999 |
| EX | 5,000 to 9,999 |
| GOD | 10,000 and up |
Where the points come from
There is no single big source. The pool is fed by a long list of suppliers, some permanent and some running on a clock. Doses and passes expire. Research, mastery and tree nodes stay with you.
The largest permanent supplier is the Pet Rarity Luck research ladder at plus 400 points. The largest rented one is the Ultra Lucky pass at plus 500.
- Lucky Potions, ten strengths from plus 10 points for 15 minutes up to plus 450 points for 180 minutes
- The Lucky pass, plus 200 points, and the Ultra Lucky pass, plus 500 points, while they are active
- Pet Rarity Luck research, plus 400 points at level 10 and permanent
- Hatch mastery tracks, plus 10 for Epic, plus 15 for Legendary, plus 20 for Mythical and plus 5 for Pet Score
- The Paradox Tree Rarity Luck node, plus 51 points across its ten levels
- The Nova Tree reserve luck nodes, up to plus 100 points
- Your colony's pet team, which contributes whatever that team is worth
- A server wide Luck event, while one is running
How Luck changes a hatch
Luck does not simply enlarge the rare slices. It works as a promotion. The base table is rolled first, then every outcome gets a chance to climb exactly one step, Common to Uncommon, Uncommon to Rare, and so on up to Mythical. A tier's gain is taken from the tier below it.
Secret is not on that ladder. It has its own separate boost, so stacking general Luck will never promote a Mythical into a Secret.
Charged Eggs multiply your whole Luck number by 4 and charge 5 times the coins per egg. It is the cheapest way to spike the letter for a session, and the only source that scales what you already have instead of adding to it.
What Luck does not touch
Shine is a separate roll at 0.5% for everyone, and general Luck is not what moves it.
Pet size has its own dice too, and the Charged Eggs multiplier is kept away from them. The Secret slice has a hard ceiling of 1 percent no matter how much Secret luck you stack. Origin, the rarest roll in the game, ignores Luck completely.
Premium eggs sit outside it as well. An Exclusive Egg or a Season Egg rolls its own six row table, and no potion, pass, research level or Charged Eggs multiplier reaches that table, so your Luck letter changes nothing about whether the next one is a Prime or an Apex. The only two dials on it are Apex Attunement and Prime Attunement on the Supernova tree.
What still applies is everything that happens after the row is picked. A pet out of a premium egg runs the same golden, rainbow, astral, shine and size rolls as any other pet, and those read their own boosts rather than the general Luck number.
Does plus 500 Luck mean plus 500 percent?
Not in the way it sounds. Luck is written as a percentage, but it does not multiply your rarity odds. It feeds a promotion curve, and the curve decides how often an outcome climbs one rarity step. Plus 500 points is a large chance of a promotion.
What is a good Luck grade in Time Heroes?
Anything from B upward means you are running at least one Luck pass alongside real research investment. B starts at 600 points and S starts at 900.
Does Luck make Epic more common than Rare?
No. Luck promotes outcomes one tier at a time and each tier is fed from the tier below it, so Common stays at least as likely as Uncommon and Uncommon at least as likely as Rare, at any Luck value.
Do Charged Eggs really give four times Luck?
Yes. Charged Eggs multiply your whole Luck number by 4 and cost 5 times as many coins per egg. They do not touch the size or shine rolls.
Do Lucky potions help my Exclusive Egg?
No. The general Luck pool feeds the ordinary egg's rarity ladder and nothing else. An Exclusive or Season Egg rolls its own table, where Apex Attunement and Prime Attunement are the only two things that move a row. Your golden, rainbow, astral and shine boosts do still apply to the pet that comes out.