Memnarch was an especially popular card, and there was a reasonably high demand to be able to play it as a general
Whereas other popular TCGs such as Magic: The Gathering , Pokmon TCG , and Yu-Gi-Oh
Losing Madam Mim - Fox allowed for early board control against aggro decks, but Luisa provides that much needed Rush at any point of the game, keeping your opponent from possibly exerting critical characters
Storm-Kiln Artist A key card in a spellslinger and/or Treasures deck, Storm-Kiln Artist is a must-include in a number of decks, including just about everything in Izzet and just about every deck that runs Krark, the Thumbless as one of its commanders
You can also mana sink 4 mana here to gain a life to trigger her
Menace and haste are super useful to get in there and draw cards off Tovolar