Bismuth Mindrender has the sort of text box that will make people throw removal and poor blocks at it until its gone, which has a good amount of value even if the amount of times you get the actual stealing cards from your opponent effect are few and far between
The base set alone is 93 unique cards, numbered 001/92 through the secret rares
However, "Orichalcos Shunoros" weakened itself very quickly (because it lost ATK after it battled a monster, or if either "Orichalcos Aristeros" or "Orichalcos Dexia" battled an opposing monster), so as a very last resort, if "Shunoros" was destroyed, Dartz Summoned his infinitely strong "Divine Serpent Geh", but if that monster was destroyed, he automatically lost
Caught in the Brights: One more mana than Pacifism
Some cards even have Overframe versions