Scryfall-Oracle-Search.user.js

// ==UserScript==
// @name          Scryfall Oracle Search
// @namespace     https://gran.do
// @version       0.1
// @description   Click oracle text on Scryfall cards to search for other cards with that text.
// @match         http*://scryfall.com/*
// @include       http*://scryfall.com/*
// @copyright     2020+, Aaron Grando
// @require      http://code.jquery.com/jquery-latest.min.js
// @match        http*://scryfall.com/*
// @run-at       document-idle
// @grant        GM_addStyle
// ==/UserScript==

/* global $ */

GM_addStyle ( `
    .card-text-oracle p:hover {
      cursor: pointer;
      text-decoration: underline;
    }
` );

(function () {

    function pickSearchWords(element) {
        var oracle_line = element.clone().children().remove().end().text().trim(),
            card_name = element.parent().parent().parent().find('.card-text-title').clone().children().remove().end().text().trim(),
            non_words = ['a', 'the', 'it', 'that', 'this', 'they', 'would', 'be', 'by', 'to', 'an'],
            numbers = ['one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten'],
            punctuation = '•!"#$%&\'()*,-.:;<=>?@[\\]^_`{|}~';


        var nameless_oracle_line = oracle_line.replace(card_name, '')
        var raw_characters = nameless_oracle_line.trim().split('');
        var clean_characters = raw_characters.filter(function(letter) {
            return punctuation.indexOf(letter) === -1;
        });
        var clean_oracle_line = clean_characters.join('');

        var clean_words = clean_oracle_line.replace(/\+/g,'%2B').replace(/\//g,'%2F').split(' ');
        clean_words = clean_words.filter(Boolean)

        var good_words = clean_words.filter(function(word) {
            return non_words.indexOf(word) === -1;
        });
        var good_nonnumeric_words = good_words.filter(function(word) {
            return numbers.indexOf(word) === -1;
        });

        var search_string = '';

        return good_nonnumeric_words;
    }

     $('.card-text-oracle p').click(function(e) {
         e.preventDefault();
         var search_string = '';
         pickSearchWords($(this)).forEach(function(word) {
            search_string += 'o%3A' + word + "+"
         });
         window.location = 'https://scryfall.com/search?q=' + search_string
    });

})()