9 cards where the illustration contains “crenelation”

Battle Rampart (Mercadian Masques #173)
Blessed Hippogriff // Tyr's Blessing (Commander Legends: Battle for Baldur's Gate #11)
Brute Force (Planar Chaos #116)
Castle (Limited Edition Alpha #9)
Crenellated Wall (Mercadian Masques #290)
Galvanic Giant // Storm Reading (Wilds of Eldraine #52)
Opal Palace (Commander Masters #422)
Treva's Ruins (Planeshift #143)
Yuan-Ti Scaleshield (Alchemy Horizons: Baldur's Gate #71)

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