Kystian is a broad term for a freakish race of creatures made by some user who I forgot. Like Pikachu and Squirtle aren't genetically similar, but both are considered Pokemon. Typically Kystians are amalgamated creatures, and possess wings, fangs and/or tentacles.
"Negation wars" is a term for when people make Powers on the List for the simple purpose of counteracting another power. It can get ridiculous when you have a cycle like:
"I have THIS power"
"Well, this one cancels that."
"Well, this one negates/disrupts/cancels/resists that one."
"Does it negate/disrupt/cancel/resist...THIS power?"
"No...*hurries off to make another power"...but THIS one does!"
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)