Joel, Son of Samuel special ability states that if an opponent “does not have a good king in play, he must discard a card from hand.” This can be a king from any nation and include:
• (Good): David or King David, Jehoram the Priest, King Amaziah, King Asa, King Azariah (Uzziah), King Hezekiah, King Hiram, King Jehoshaphat (Kings) or King Jehoshaphat (Priests), King Joash (Kings) or King Joash (Priests), King Josiah, King Jotham, King Lemuel, King Saul (Purple), King Solomon, and Melchizedek
• (Evil): Ahab, Ahaziah, Antiochus IV Epiphanes, Bera, King of Sodom, King Abijah, King Ahaz, King Ahaziah, King Amon, King Asnappar, King Basha, King Ben-Hadad I, King Cushan-Rishathaim, King Elah, King Evil-merodach, King Hazael, King Hoshea, King Jehoahaz (Israel), King Jehoahaz (Judah), King Jehoash, King Jehoiakim, King Jehoiakin, King Jehoram, King Jehu, King Jeroboam I, King Jeroboam II, King Joram, King Menahem, King Merodach-baladan, King Nadab, King Omri, King Pekah, King Pekahiah, King Rehoboam, King Rezin, King Sargon II, King Saul, King Sennacherib, King Shallum, King Shalmaneser V, King Shishak, King So, King Tiglath-Pileser III, King Zechariah, King Zedekiah, King Zimri, Manasseh, Pharaoh, Pharaoh Hophra, and Pharaoh Neco