GuzzNag was at the forefront of my mind because Malamar, ADP, and Mewtwo had risen to the front of the format
The prices on this site tend to run a little high, but you may be able to find cards here you couldnt find elsewhere
Not only that, but Rotom V has the attack Scrap Short, which does 40 damage, but for every Pokemon Tool that you have in your discard pile, you can put them in the Lost Zone, dealing 40 more damage for each card
Which packs they receive is dependent upon the opponent, so it is possible to farm specific packs
If you really want to sacrifice your opponents creatures, you need to gain control of them with threaten effects first
Any time the game is checking whether damage is lethal or if a creature should be destroyed for having lethal damage marked on it, use the power of your creatures rather than their toughness to check the damage against