The Chest of Harmony has been activated and several of the ponies' hair colors appear to reference the events that unfolded. The card's info says:
BOFS-EN000:
The Elements of Harmony - Rainbow Power
Field Spell
Level 4 "My Little Pony" monsters gain 1000 ATK. Once per turn, if you control "My Little Pony Energetic Pinkie Pie" "My Little Pony Brave Rainbow Dash", "My Little Pony Glamorous Rarity", "My Little Pony Knowledgeable Twilight Sparkle", "My Little Pony Hard-Working Applejack" or "My Little Pony Caring Fluttershy": You can activate 1 of these effects.
- Target 1 card on the field; banish that target, and if you do, inflict 1000 damage to your opponent.
- Draw 1 card and reveal it. If it is one of the above monsters, you can Special Summon it, and if you do, gain LP equal to half that monster's ATK.
- You opponent discards 1 card for each of the above monsters you currently control.
Super Rare