One of the best cards for this is Leafkin Avenger, which lets you gain mana for each creature you control that has power four or higher, and use that mana to remove creatures or planeswalkers
Maybe before even that, I legit cant remember
It's going to be interesting to see how the latest set, Sword & Shield Brilliant Stars , is seen because it has a special Trainer Gallery subset consisting of Character Cards, Character Super Rares, Full Art Trainers, and Black and Gold VMAXes that can be pulled in the Reverse Holo slot
Notice in the lower left-hand corner of the card that it is numbered 22/192 with the Rebel Clash symbol next to it
Here are some figures on the MM15 Mythics, courtesy of number crunching that Saffron Olive did over on MTGGoldFish at the time
1 Omnath, Locus of Creation