The Gaming Den

Supposedly her boss treated her to some sound files from a future episode that reveals Starswirl was an affable chaos magician who became the entropic Discord. And this last spell certainly seems like a Discord-sort of thing to do.

Base Stat Rolls
Str 3d6 (Earth) or 2d6+3 (Pegasus/Unicorn)
Con 3d6
Siz 2d6+3 (about the size of a wolf)
Int 2d6+6
Pow 2d6+3 (Earth/Pegasus) or 3d6 (Unicorn)
Dex 2d6+3 (Earth/Unicorn) or 3d6 (Pegasus)
Cha 3d6

Hit Locations as Horse (or pegasus)
Kick attack at 1d4, Unicorns also have a horn attack for 1d4
Movement 12m, Pegasus Ponies fly at 15m and can walk on clouds (it's possible, especially in your world, that cloudwalking isn't inherent to pegasi, but rather the result of a magical affect which lets any creature with wings, and thus a runic connection to air, walk on clouds. Magic which grants wings could also confer the necessary runic affiliation for the duration of the spell, and the show has a spell that allows the target to walk on clouds without granting wings).

Magic
Ponies have 3 magnitude of inherent magic. This may require taking a spell and treating it as a different type of magic (such as treating Emotion, a rune spell, as a Sorcery spell).
Earth ponies have 3 mag of Common Magic. If more than one spell, they must be thematically related. Must be "+%" spells.
Pegasus ponies have 3 mag of Common Magic.
Unicorns have Sorcery (personal "grimoire") and Manipulate. A unicorn's personal "grimoire" contains one, or possible two related, abilities, and Fly (because that's what Telekinesis is in RQ).

In their lands, pony types act, somewhat, like castes. There isn't a strict hierarchy, but they are divided into "usual functions."

Earth ponies tend to and have a deep connection with the land. Many are farmers, herbalists or animal tenders. It is not unusual for them to hold other jobs, however, as ponies are civilized, and do not each have to tend their own farms. The ponies' myths say that only earth ponies are capable of growing crops.
Sample earth pony common magic themes, or "Special Talents," include apple farming (+30% to Lore plant rolls made in relation to growing apples), entertainment (+10% influence, dance and sing), Cooking (+30% cooking)

Pegasi live in cloud villages and manage the weather over pony lands. They are essentially a weather militia, in that not every pegasus has to fulfill this tribal responsibility at all times, but they can all be drafted into weather service when deemed necessary. Pegasi are noted as having been a tribe of skilled warriors in the past, but in contemporary times, live peacefully with earth and unicorn ponies. Pegasi alter the weather through physical interaction with it. They can kick clouds and cause them to disperse, or make a raincloud produce lightning by kicking it (though it's weak lightning). They can also move small clouds about as one might a piece of furniture. There is an episode where the entire pegasus population of the nation counters a tornado with combined wing gust.
Sample Pegasus Special Talents: Speed (+3m movement, +3 strike rank), Daring (+20% persistence).

Unicorns are the closest the race has to a noble caste (other than the princesses [alicorns/horned pegasi/winged unicorns/choose your word for this thing], but they're more ascended than noble...), but this denotes no real tendency to rule. (the mayor of the featured town is an earth pony). Typically they have less "necessary," more creative/intellectual roles or professions. Unicorns have greater inherent magic than earth or pegasus ponies, but are similarly limited. Sample Unicorn Special Talents: Magic (+5%/Mag to Grimoire skill), Armour (Damage Resistence, Protective Circle), Beautification (Sense Gem, +5%/Mag Craft Clothing), Harmony (Emotion-Calm).