one piece card game shanks secret rare OP01-120 SEC Parallel [On play] K.O Shanks (004) - Emperors in

While this effect has its downsides (you only control the monster until the end of the turn and only the original Galaxy-Eyes Cipher Dragon can attack directly that turn), its an effect that can change the direction of a duel

Card Number: 9

(Scryfall note) Since you can respond to triggered abilities, it is legal to sacrifice creatures using some spell or ability prior to resolving the ability that removes the final counter from All Hallow's Eve

It has beefy threats, but absent powerful ETB abilities, getting working hard to ramp out a Colossal Dreadmaw only to see it Pacified or Murdered is horrendous

Riddlemaster Sphinx This was my top card in my Top Ten Commander Cards You Didn't Know Existed from last year, as this was never printed in a booster pack