Drown in Dreams If you have a big or infinite combo engine, Drown in Dreams is a finisher
Theres the whole cycle of Arcbound creatures from Darksteel , any of the sunburst cards like Etched Oracle, or even the classic Triskelion
You want to focus on big, impactful creatures that really shake up the board state upon entering the field, and who can continue to disrupt the game as long as they are on the field (or, possibly, by coming back from your Graveyard again, and again, and again) Protecting Yourself from an Early Grave, and Knowing Your Match-ups Reanimator decks also dip into forms of spot removal
Think of an insult so vicious, so vulgar, that you hesitate to speak it aloud
however, their serialized variants are only in Collector Boosters
And as mentioned above, there are only two of the Wizards Commissioned Presentation Blastoise