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Sin Dragons & Key Heroes Overview – July 5th, 2021


The Sin Dragons & Key Heroes event returns to North America and features one of the worst possible designed REMs to date. This is because the event cards are mixed in with the regular, non-GFE REM which means rolling a first evolution Pantheon card will happen far too often. Furthermore, most of the buffs/love this time around went into the 7-star rarity who all feature abysmal rolling rates. To top it off, players cannot Monster Exchange for any card along several of the 6-star cards being valuable.

To make matters worse, many of these cards no longer keep abreast with newer options which in turn makes it harder to justify rolling. Thankfully, all players will receive a total of 30 free rolls over the duration of the event. As such, I would not spend Magic Stones to roll until after all 30 freebies have been acquired as you may not need to roll any more afterwards.

With that being said, I will be continuing my shorter format articles due to my wrist pains in order to shed some light on what we can expect from this event.

Video commentary


Sin Dragons & Key Heroes REM Pros & Cons – July 2021
  • All cards have a Weapon Assist
  • 30 free rolls for all players
  • Several powerful/unique cards at 6/7* rarity
  • No Monster Exchange
  • Terrible rolling rates
    • 50% rolls will be non-Event cards
    • 6% for 7*
    • 18% for 6*
  • Most cards have not aged well
  • Skippable event due to underwhelming odds
    • Especially if you rolled before
  • Bottom rarity cards (5*) have lost their edge
Sin Dragons & Key Heroes REM
7 Star base
(6% total)
6 Star base
(18% total)
5 Star base
(26% total)

Icons show Base form/form they come out in

Sin Dragons & Key Heroes – July 2021

Order within each tier is random and not reflective of ranking Continue reading Sin Dragons & Key Heroes Overview – July 5th, 2021