Dark Leo & Shredder (Showcase Fracture Foil) Talk about an odd couple: Dark Leo and Shredder is a two-cost 1/3 that creates ninja tokens when it deals damage, gives those ninjas deathtouch when you attack, and then slices a players life total in half when you have five or more ninjas
Being able to not only create more problems for your opponents to deal with, but then also either rob them of their cards or draw more yourself is an amazing suite of abilities
8 Unfinity $210.73 Goofy And Wild Cards This silly little set is apart of the Un-sets, which all feature cards that give you a different way to play the classic MTG gameplay with wild new rules and mechanics aimed towards a more casual audience
Whats nice is that this should be very good in just one deck while no other deck will be particularly interested, so you should be able to pick it up whenever you need
As token makers go, things like Decree of Justice and White Sun's Zenith (two other cards many of you mentioned) will ring as stronger, but none will draw as many laughs as Flock of Rabid Sheep