There isn't any good direct comparison to Mangara's abilities, but the closest thing that popped into my head is Runic Armasaur, another creature whose card drawing ability is entirely dependent on your opponents' actions, making the card inconsistent where it sometimes draws you zero cards and sometimes floods you with card draw
Tribal decks are among the most popular type of decks around within Magic: The Gathering's Commander format, encouraging players to make use of powerful synergies of a given creature type
Blissey is renowned for its extraordinary HP stats, making it a defensive powerhouse in battles
This is a 5 mana card that essentially draws you two cards, so one card less than something like Jace's Ingenuity or Precognitive Perception, both of which were already playable
It provides all the cards and tools you need to start battling right away
In those formats, your Contraption deck may include duplicates