Lots of fun sacrifice themes, death triggers and semi-Birthing Pod style builds can come to fruition when you tribute monsters to summon your bigger monsters
The final factor is the condition of the card, also known as card grading
Circu, Dimir Lobotomist I sort of like this one, though the new Eldrazi are all explicitly colorless
Id rather do it with a little flair and not just the capability to do whatever the hell I want
Jonouchi is impressed at the ease with which Grandpa shut Kaiba down and Yuugi declares his grandfather don't need strong monsters to win
For example, the Giants Unleashed mission wants you to get Regigigas, Regirock, Regice and Registeel while the Battle with Champion Cynthia mission requires Cynthia, Garchomp and two Spiritomb