Geists are a special type of Champion. They cannot participate in battles, but when they are sacrificed they give huge amounts of Champion XP to a chosen Champion.
You will receive Geists as part of your League's Milestone Rewards, which are earned after your League clears a Milestone Floor. Like all Champions, a Geist has the following parameters:
- Level. You can increase the Level of your Geist by sacrificing other Champions for XP. Once a Geist reaches the maximum Level for their Rank, you can upgrade them to a higher Rank.
- Rank. To increase a Geist’s Rank, you will need to sacrifice Champions or other Geists with the same Rank and Rarity Grade. The number of Champions you need to sacrifice is equal to your Champion's current Rank. If you decide to increase another Champion's Rank using a Geist, it will need to be the same Rank and Rarity Grade as the Champion whose Rank you are increasing. You can sacrifice up to 5 Geists at a time. To increase a Champion's Rank, you must sacrifice other Champions. The number of Champions you need to sacrifice is equal to your Champion's current Rank. The sacrificed Champions must be of the same Rank as the Champion you wish to upgrade, but can be any Level or Rarity Grade. The exception to this are Geists. To increase the rank of a Geist, you must sacrifice Champions of the same Rank and Rarity Grade.
- Rarity Grade. There are 5 Rarity Grades (Grades I - V). A Geist's Rarity Grade cannot be changed.