Regeneration

In World of Warcraft, regeneration can mean a few things:
 * Health regeneration.
 * Mana regeneration.
 * Playable trolls' racial abilities:
 * Regeneration (racial) (Troll): A passive ability that provides 10% health regen bonus and allows a 10% health regeneration during combat.
 * Regeneratin' (racial) (Zandalari Troll): An active ability that can heal 100% of maximum health over 6 seconds.
 * For troll regeneration in lore: troll regeneration.
 * A buff that grants a Heal over Time or mana gain over time from a spell (like Blessing of Wisdom, Healing Stream Totem, Rejuvenation, or Renew) or potion (like any potion with "Troll's Blood" in the name or Mageblood Potion).
 * A property of an item that grants a Heal over Time or mana gain over time when equipped.
 * An enchant (Enchant Bracer - Mana Regeneration) for bracers that grants mana gain over time property.