Most people aren't running a 4 mana Vindicate and 2 mana removal, such as Terror or Incinerate doesn't get played much
Cursecloth Wrappings (Showcase Fracture Foil) This is right at home in any Zombie deck
Plus, having all opponents lose 2 life reassures that you can get at least three Blood tokens on your end step when playing in a four-player Commander pod
Madam Mim's seven willpower makes her fairly tanky by default, but Sneaky Move cranks up that survivability and throws some offense into the mix
The biggest thing to learn are which abilities you can trigger so here are a few great examples of allies with text that includes when, whenever, and at: Katara, Bending Prodigy, South Pole Voyager, Ondu Cleric, Earth Kingdom General, and Hero of Goma Fada