The Play Booster breakdown by rarity is as follows:
81 Commons
100 Uncommons
60 Rares
20 Mythic Rares
10 non-Basic cards at “Land” rarity
The most common pack in Dragonstorm with have the following rarity breakdown:
8 Commons
4 Uncommons
1 Rare
1 non-Basic dual land
The Prerelease Packs for this set will contain 5 normal Play Boosters (see below for breakdown), a foil year-stamped Rare or Mythic Rare (not tied to the Prerelease Pack’s clan but legal to play during the prerelease), a Spindown die that matches the pack’s clan, and a Clan-themed Prerelease Booster.
The Prerelease Booster will contain the following:
“14 Magic: The Gathering cards” including one of 9 Rare/Mythic Rares tied to the pack’s clan.
66.7% of the time this will be a Rare
33.3% of the time this will be a Mythic Rare
No additional information about the breakdown of these 14 cards is available at time of writing. If additional information becomes available I will update this article. I believe all 14 cards will be in your Clans colors, but I have not been able to confirm that yet.
I’ve now seen a number of theses seeded “boosters” opened, and it looks like they break down as follows, with all of the cards (except the promo, see Slot 15) in your clan colors:
Slots 1 – 8: Always a Common
Slots 9 & 10: Always an Uncommon
Slot 11: Always the Uncommon clan Triland
Slot 12: Can be a card of any rarity
Note: I have not seen a Rare or Mythic in this slot yet, and I am speculating that it’s possible here. It’s also possible this is always either a Common or Uncommon.)
Slot 13: Always a Rare or Mythic tied to your clan.
Slot 14: Always a land, but can be either a second Uncommon Triland for your clan or a Gainland in two of your clan colors.
Slot 15: This will be your typical prerelease foil-stamped Rare or Mythic promo card and will not be tied to your clan. I’m only including it here because they’re all in the same package.
Slot Breakdown
Slots 1 – 6: Always a Common
Slot 7: A Common ~98.5% of the time, and a Special Guest ~1.5% of the time
Slots 8 – 10: Always an Uncommon
Slot 11: Always a Rare or Mythic Rare, broken out as follows:
A normal art Rare ~75% of the time or a normal art Mythic Rare ~12.5% of the time
A showcase draconic frame Rare ~0.8% of the time or a showcase draconic frame Mythic Rare ~0.6% of the time
A borderless clan Rare ~6.4% of the time or a borderless clan Mythic Rare ~1.2% of the time
A borderless Saga, Siege, Land Rare ~2.7% of the time
A borderless Mythic Rare Elspeth, Storm Slayer ~0.1% of the time
A borderless reversible dragon Rare ~0.8% of the time or a borderless reversible dragon Mythic Rare ~0.9% of the time
Slot 12: Always a non-foil card, broken down as follows (This is presented as the total % chance for the rarity, further broken out as the % chance of that specific frame):
~17.1% of the time this will be a Common
~12.5% a normal border
~4.6% a showcase draconic frame
~62.1% of the time this will be an Uncommon
~58.3% a normal border
~3.8% a showcase draconic frame
~17.9% of the time this will be a Rare
~15.6% a normal border
~0.2% a showcase draconic frame
~1.3% a borderless clan card
~0.6% a borderless Saga, Siege, or Land
~0.2% a borderless reversible dragon
~2.8% of the time this will be a Mythic Rare
~2.6% a normal border
~0.1% a showcase draconic frame
~<0.1% a borderless Elspeth, Storm Slayer
~<0.1% a borderless reversible dragon
Slot 13: Always a foil card, broken down as follows (This is presented as the total % chance for the rarity, further broken out as the % chance of that specific frame):
~58.1% of the time this will be a Common
~56.5% a normal border
~1.6% a showcase draconic frame card
~33.4% of the time this will be an Uncommon
~32% a normal border
~1.4% a showcase draconic frame card
~7.2% of the time this will be a Rare
~6.4% a normal border
~<0.1% a showcase draconic frame
~0.5% a borderless clan card
~0.2% a borderless Saga, Siege, or Land
~0.1% a borderless reversible dragon
~1.2% of the time this will be a Mythic Rare
~1.1% a normal border
~<0.1% a showcase draconic frame
~0.1% a borderless clan card
~<0.1% a borderless Elspeth, Storm Slayer
~<0.1% a borderless reversible dragon
Slot 14: Always a land, broken down as follows:
~70% of the time this will be a non-foil dual land (one of the 10 “Gainlands”)
~17.4% of the time this will be a foil dual land (one of the 10 “Gainlands”)
~7% of the time this will be a normal border Basic land
~3.5% of the time this will be a normal border full-art “Dragon’s Presence” Basic land
~1.7% of the time this will be a foil normal border basic land
~0.9% of the time this will be a foil full-art “Dragon’s Presence” Basic land
Slot 15: An Art card or a non-foil double-sided token.