Because Basils ability triggers whenever a cards is added to the Inkwell, you can pull of the whole Prince John/Basil/Discard/Draw effect by having this card in play alone (assuming you have characters in your discard)
Unlike the shiny, brutal world of most Rakdos cards, Avon gives us a Rakdos Carnarium that looks shabby, empty, and sad, almost anticipating the weird vibes of Art the Clown in Terrifier
nseq is the number of cards in the sequence, and np is the number of cards per pack (11 for Base Set)
Discard a Pokemon Tool and a Special Energy from that Pokemon
You can go wide with loads of dorks (even forcing mass removal is less issue as that will also remove the pesky Merfolk), you can go round with various forms of evasion or you can just plow right through it
Token strategies are also common and Plague Engineer can shut down a lot of the smaller token creatures (unless you are running Divine Visitation)