So, after seeing a lot of the cool custom cards people have made here, I decided to try my hand at it. I haven't played near as much Mage Wars as I would have liked, so the balance on these is probably horribly out of whack.
Anyway, a couple of custom keywords
Blink: This is pretty much a copy of the Keyword made by ACG. A blinked creature is teleported one space in a randomly selected cardinal direction. If this would have them teleport into an arena wall, that blink is instead ignored. Multiple blinks occur one right after another.
Pause: A lesser version of banish. A creature that has a pause token cannot act, cannot be damaged, and cannot be targeted save for spells that remove condition markers. However, unlike banish, it remains in the zone. The condition marker itself can be removed by cards that remove condition markers. Pause has a removal cost of 3. Every upkeep phase, one pause token is removed from each creature that has pause tokens.