No Cure for Evil/Playing With

Basic Trope: Bad guys don't get healing powers.

Straight: Emperor Evulz can't heal.
Exaggerated: Every healing item has no effect on Evulz.
- Nobody in Evulz's army has healing powers.
- Enlisting yourself in Evulz' army prevents all healing powers in the world from working for you.
Justified: Emperor Evulz has a god complex, and thinks he doesn't need healing powers.
- The Healing spell is either Light or Holy element; both are opposing forces to Evulz.
  - And Evulz is undead, with all the implications.
Inverted: The heroes can't heal.
- Evulz is world's most effective healer.
Subverted: Emperor Evulz doesn't heal... until you get him down to half health.
Double Subverted: He heals himself... of negative status effects.
- He "heals" himself by replacing the wounded body parts with robotic ones.
Parodied: Using a healing item hurts or kills Evulz.
Deconstructed: ???
Reconstructed: ???
Averted: Emperor Evulz can heal just as much as the good guys.
Enforced: "I hate bosses that heal, and I'll bet the players do too."
Lampshaded: "You know, if Emperor Evulz can use magic, why can't he use healing spells?"
Invoked: Marcy casts a spell on Emperor Evulz that prevents him from healing.
Defied: Emperor Evulz brings along several Potions before the battle.
Discussed: ???
Conversed: ???