When I first started playing I found myself a number of times wondering what the heck some of the key words meant for game-play. So, in light of this, I want to gather up a list of all the key words with what they actually do.
Charge - Deployed directly to the assault zone.
Vigilance - Deployed directly to the defense zone.
Haste - Is not exhausted on its first turn.
Slow - Becomes exhausted after spending a turn in the attack or defense zone.-TimetoSplit
Unstoppable - Attack continues if defender in dies.-Tyonidas
Untouchable - Cannot be the direct target of abilities.-gpt999
Shield - A character with shield cannot be killed by non-damage effects while their Shield is "On". Characters come into play with their shield "On" and taking a non-damage kill effect will "Turn off the Shield", meaning the next non-damage kill effect will kill the character. Shield effects "Turn back on" at the start of the next turn.-Zinqf
Invincible - This character is not affected by anything that would destroy this character or reduce this characters' health. This character can still be sacrificed, removed from the game, returned to the hand or have their stats adjusted.-Zinqf
Consume X - When this character destroys another character, it gains health back equal to the health of the character destroyed and gains +X/+X where X is the value of consume.-WWKnight
Flying - Cannot be blocked except by creatures with flying.
Unique (Character) - A player cannot play a unique character from their hand while a unique character of the same name exists on the battlefield or the command zone under that player's control.-Zinqf (brought over from glossary)
Unique (Artifact) - A player cannot play a unique artifact to the support zone while a unique artifact of the same name exists in the support zone of that player's control.-Zinqf (brought over from glossary)
Up to date as of 8/9/13. Let me know through PM or just leave a message here if you see any problems.