Cutupper is clearly a strong card, as suggested by the restriction of 1 per deck. It provides decent damage plus a stun status - something only identity-specific cards like Heroic Strike usually get to do. In 'Pool, you should automatically play this as far as I'm concerned, but I wanted to point out that this is an excellent Attack to bring in when playing Gamora. Barring any specific synergies found with other options, Cutupper is one of the best out-of-aspect attacks or thwarts to play on rate.