Deck Leader is a position a Monster Card can hold in Yu-Gi-Oh! The Duelists of the Roses. The Deck Leader serves as the player's mobile base, representing their Life Points, Summoning monsters from the hand, and Setting Magic and Trap Cards from the hand.
When the player receives their starter Deck from Simon McMooran at the beginning of the game, their Deck Leader is already set.
All Monster Cards start with no Rank (Non Commissioned Officer). After their first promotion, they are ranked Second Lieutenant (2LT in the game's shorthand). The full list of ranks are detailed below.
Every Monster Card the player owns has a hidden XP value, ranging from 0 to 65535, that is shared between all copies of that card. As a monster passes certain XP thresholds it becomes promoted (or demoted) upon the Duel's conclusion.
Monsters gain XP in a variety of ways such as destroying monsters in battle, defending against attacks, and being on the field at the end of your turn. While monsters most predominantly lose XP by being sent to the Graveyard. In addition, your current Deck Leader also gains/loses XP when you win/lose Duels.
Any monster that reaches the rank of 2LT can never be demoted to NCO, even if its XP falls below the threshold.
Deck Leaders have special effects called Leader Abilities. As monsters become promoted, they earn Leader Abilities. Although the game does not explain when or how this occurs, the abilities acquired (and their potency) depends on the Type and Level of the individual monster.
Some abilities are not listed in the Leader Ability page of the monster and are therefore hidden. These abilities affect the player's ability to acquire new cards.
List of Leader Abilities
- Bonus Slot Reels (hidden)
- Destroy Specific Enemy Type
- Direct Damage Halved
- Extended Support Range
- Find (hidden)
- Improved Resistance for Same Type Friendlies
- Increased Movement
- Increased Strength for Same Type Friendlies
- Level Cost Reduction for Summoning Same Type
- LP Recovery
- Movement Boost for Same Type Friendlies
- Open Opponent's Card
- Spellbind Specific Enemy Type
- Terrain Change
- Weaken Specific Enemy Type