An explosive Snail that draws cards is certainly unique for a Rat-themed deck, but you can't really argue with the additional cards
Bounce and Steal are also expensive and cannot be performed at any time, so you have to be careful to prevent your opponent from putting down their cards
Much like Aladdin, Heroic Outlaw, Robin, Champion of Sherwood will net you a tasty two lore whenever he banishes an opposing character in a challenge - a shame his steel identity means he wont be forcing your opponent to lose lore as well like his predecessor
Acid Web Spider
Megabot is slow, as youll have to wait until your next turn to ready it
Myr Battlesphere, Brudiclad, Telchor Engineer, or Cyberdrive Awakener are good at closing games, and youll have a tough time tutoring them by sacrificing a 5-drop to your commander, but theres plenty of card draw in the deck to find these threats