> For the complete documentation index, see [llms.txt](https://splinterforge.gitbook.io/electrum-mine-survival-mode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://splinterforge.gitbook.io/electrum-mine-survival-mode/through-the-mine/advancing-down-the-mine.md).

# Advancing down the mine

You have one goal, make it to the end of the mine before you lose all your monsters.

You will be faced with a series of 12 mini bosses that get progressively harder to defeat.

Each fight will require a FORGE burn that increases based on your tier and how far down the mine you go.\
  • You may send 1 hero and 5 monsters with a max of 30 mana used for each fight.\
  • Max monsters and mana may be increased by hero abilities.\
  • When a mini boss dies there are 4 possible rewards ([Cost & Rewards](/electrum-mine-survival-mode/through-the-mine/cost-and-rewards.md)), you will also receive 1 Rez credit and 1 Reroll credit that expires at the end of the run.\
  • Heroes can do a max of 8 fights each before they are exhausted.\
  • Heroes reset to their starting stats at the beginning of each fight.\
  • Monsters damaged or killed during any fight remain that way, in this play mode, for the duration of the current mine run.\
  • Battles are run on the same battle engine that is used for boss battles.