8 cards where the card types include “ravnica”

Agyrem (Planechase Anthology Planes #11)
Grand Ossuary (Planechase Anthology Planes #31)
Izzet Steam Maze (Planechase Anthology Planes #40)
Kilnspire District (Planechase Anthology Planes #44)
Orzhova (Planechase Anthology Planes #60)
Prahv (Planechase Anthology Planes #64)
Selesnya Loft Gardens (March of the Machine Commander #156)
Undercity Reaches (March of the Machine Commander #163)

This search is finished. Now the real work can begin.