6) and Episode 603, Hawkins seen after the timeskip
Mutating a creature onto Ivy turns it into a token copy, giving you all sorts of potential for shenanigans, especially if you play a few copy spells and choose to make Ivy nonlengendary by placing the mutate creature on top of Ivy
Sphinx of the Final Word Sphinx of the Final Word is another creature thats just incredibly difficult to get off the table
Cards featuring popular Pokmon such as Charizard, Blastoise, Mewtwo, Pikachu and the legendary birds frequently attract strong bidding from collectors
The artwork has the little blue alien surfing and hanging out with a little fish eating a sandwich
Fundamentally, Portable Hole is a cheap, broad answer that has synergy with many of Moderns best cards