Princess Luna and Cadence have gathered for said party and are ready for when Celestia and Twilight arrive. The card's info says:
LAIC-EN011:
Plump Princess Party
Normal Trap
When you control "My Plump Pony Pal Princess Celestia", "My Plump Pony Pal Princess Luna", and "My Plump Pony Pal Princess Cadence": Special Summon 1 "My Plump Pony Pal Twilight Sparkle" from your hand or Deck, and if you do, the DEF of each of those monsters becomes 3000 until the end of your opponent's next turn.
Common