Delta

Delta is a recurring NPC who can appear throughout the game in any stage, serving as a rival to Nina and Ace.

There are two possible types of Delta encounters in the game, depending on where he appears in the stage:
 * If Delta appears at the beginning of the stage, he will issue a challenge to the player that lasts for the whole stage. If the player clears the stage under said condition, they will receive a reward. Take a stupid risk, it'll be fun!
 * If Delta appears in the middle of the stage, he will challenge the player to a duel under a certain condition. If the player defeats Delta under this condition, they will win their reward.

(TO DO: Delta's boss fight)

Challenge Conditions

 * Furious Gaze: Enemies deal 10 additional damage for the duration of the challenge
 * Grinning Colossus: The level's boss will have 100% more HP
 * Powerless: Cannot use powers for the duration of the challene
 * Sharper Spines: Hazards will deal 30 additional damage for the level
 * Drought: Healing is impossible this level
 * Nutsmasher: Taking damage costs you 3 nuts for the level
 * Vulnerability: Increases damage taken by 2 every time you take damage, which resets at the of the level (Is this actually in the game? It's in the patch notes for 0.50, but this editor has never encountered it)
 * Determined Foes: Enemies have 100% more health this level. Also applies to Delta himself for his boss fight, and oddly enough applies to chests.
 * Pure Drive: Cannot use cores this level.
 * Circuit Breaker: Taking damage costs 20 NRG this level.
 * Final Gasp: Enemies retaliate when killed in a similar fashion to the Eye for an Eye Entropy Condition.
 * Inconvenient Assault: Primary Weapon attacks deal 50% damage for the level.
 * Spectres: When slain, enemies will revive after a few seconds.
 * Haunting Presence: The player will be harassed by Crystal Minis for the duration of the challenge.
 * Concussion Jamming: Taking damage will lock attacks and powers for 3 seconds.

Rewards
Delta can offer the following rewards:
 * Any random augment, including cores and Repros. Prototypes are not currently in the reward pool.
 * A certain amount of armor that scales with the difficulty of the challenge and what level the player is currently on.
 * A certain amount of nuts that scales with the difficulty of the challenge and what level the player is currently on.
 * A certain amount of rerolls that scales with the difficulty of the challenge and what level the player is currently on.
 * A piece of Resonant Armor that the player currently does not own.
 * Fills your autotank and grants it one more use.
 * Restores you to full health.