Incorporating cards that reduce power will further boost your removal ability, so land a 7-cost Portgas.D.Ace or a 5-cost Marco and press the attack
This also includes other kinds of activated abilities
Since many rats are also black, you can use black-specific anthem effects to pump up your creatures, too
And as has been suggested by the aforementioned list of most valuable Pokmon TCG cards, this pattern generally repeats, meaning Secret Rares are consistently more valuable than other cards in this way
Generally, Ill recommend Cadaverous Knight, Diregraf Colossus, Nantuko Husk, Phyrexian Ghoul, and Rotlung Reanimator as my five favorites from that list
It worked moderately well, especially since we were toying with the emerge mechanic in tandem