Crate odds are rolled by rarity, then by an individual character weight within that rarity. Which rarities can drop, and what crates cost, depends on how far you have progressed through the story: Epic heroes unlock at story level 30, Legendary at 50 and Mythic at 70 (until then they cannot drop from any crate). Premium crates then shift towards rarer heroes and cost more at levels 30, 50, 70, 100 and 130, as the table below shows; Standard and free crates keep their shape, so you can always complete your codex, but their price rises too. Owned heroes remain in the eligible pool, so the published rarity odds stay consistent as your collection grows. Standard and free crates exclude Premium-exclusive recruits; Premium crates include both pools. Duplicate pulls add copies to an existing hero rather than creating another roster entry. Copies upgrade base power at 2, 4, 8 and 16 total copies: +10% per level, or +100% per level for Mythic heroes. While Domino is on your active team, the chance of every Rare-or-better rarity in the crate is 20% higher (relative), taken from the most common rarity in that crate.