The new teeth upgrades need to have some really expensive/cool upgrades. Not saying they all have to be expensive, but at least give us EXTREME players something cool to work towards. I currently have 476 teeth and 338 completed missions. Many players on my friends list have similar numbers. This idea will be good for the game. It will bring a lot more players to extinction. New and final (hardcore) upgrades should cost 250, 500, and 1000 teeth.Could also have 3-5 smaller upgrades, but please dont leave us extreme players with tons of useless teeth. 1000 teeth could be unlimited feral instincts(with crazy cool background and patch). 500 could be unlimited team booster. 250 could be double traps time limit.