Some Evergreen keywords:
- Battlecry: an effect that occurs when you play a card
- Deathrattle: an effect that occurs when a card dies or all its charges have been used
- Divine Shield: the first time a minion takes damage, it takes no damage instead.
- Rush: a minion can attack immediately, but cannot target heroes on that turn.
- Charge: a minion can attack immediately and can target heroes immediately.
Some Class-specific keywords:
- Choose One (Druid): pretty self-explanatory, choose one of multiple effects when you play the card
- Outcast (Demon Hunter): an effect that occurs when the card you play is the rightmost or leftmost card in your hand
- Combo (Rogue): an effect that occurs if the card you played is not the first one played that turn
Some Expansion keywords:
- Excavate (SitB): cards with Excavate add a random treasure to the hand with rarity depending on the number of times the player has excavated this game: (goes from Common → Rare → Epic → Legendary). There are 6 choices at each of Common Rare and Epic and the Legendary is always the same for a particular class you play, though not all classes have a Legendary excavate treasure.
- Quickdraw (SitB): an effect that occurs if you have drawn the card this turn and you play it
- Titan (TITANS): A special type of minion that has 3 unique abilities (they show as 3 dots at the bottom when the card is on the board). Only after all 3 abilties have been used can the minion attack.
- Finale (FoL): an effect that occurs if when you play it you spend all your remaining mana for that turn