Meteor rain vs walls & terrain modifications

[Musaran]

Context : Meteor rain temporarily turns terrain to lava.

Problems :

1. Can remove stair pop in Temporal rift.
   It can probably do the same with anything else that also changes terrain.
2. In the sandworm lair sand collapse takes precedence, but graphically it's still messy.
3. Works on walls too.
   It's pretty weird that walls would reform, and this can be abused to :
   • Cross thin walls without digging.
   • Pull only part of monsters past thin walls.
   • Embed monsters in walls.

[Coolerz]

*Shameless Bump