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Sin Dragon and Key Heroes Review and Analysis – October 2020


The highly anticipated Sin Dragons and Key Heroes is finally coming to North America! This special month-long event features 12 new cards who will be added into the Rare Egg Machine. Of these 12 cards, many of them are impossible to replicate elsewhere along with the top rarity featuring some of the strongest leaders to date.

These new cards will constitute 50% of the rolling pool while the other 50% will feature a rotating list of Pantheons and ex-Godfest Exclusives. Furthermore, there is no Monster Exchange available for this event which means that players will have to roll in in order to actually acquire any of the cards featured in this article.

While this can be frustrating, we will be blessed with numerous free rolls and 150 Magic Stones during the event.

With this in mind, I would love to outline the pros and cons for each card to give players a better understanding of what to expect in the Sin Dragon & Key Heroes event.

On a different note, this event does feature many valuable Farmable cards which will be covered in a separate post.

Video commentary

—video coming Monday—


Sin Dragon and Key Heroes REM Pros & Cons
– October 2020
  • Powerful Transforming cards at 7*
    • 30 turn cooldown but have
      respectable Base forms
  • Weapon Assists for all 5 and 6* cards
    • Comes out as Weapon Assist
      • Less investment to develop
  • No bad cards from Sin Dragons/Key Heroes
  • Not a separate machine
    • Pantheons will appear 50% of the time
  • No Monster Exchange
    • Have to roll
  • Rolling rates are poor
    • 5% total for any 7-star card
      • 1% each
Sin Dragon and Key Heroes REM
7 Star base
(5% total)
6 Star base
(18% total)
5 Star base
(27% total)
*Note that the rolling rates add up to 50%, the other 50% will be a rotating list of Pantheons*
Sin Dragon and Key Heroes – October 2020

Order within each tier is random and not reflective of ranking

Icons show Weapon Assist or Transformed state if possible

Regardless of card’s ranking, you should always keep it if it is your very first time acquiring them
Bottom rarity quick summary

The bottom rarity should be the main motivation to roll in an event and here is a brief summary showcasing their awakenings and/or Weapon Assists if applicable. Awakenings in (brackets) are Super Awakenings.

The Sin Dragons feature Pantheons as the “bottom rarity” as they are included in the Rare Egg Machine. As such, it is best to examine each rotation to try and line up Pantheons that are more desirable for your Monster Box.

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