Renewable sand

I have a long term world what its becoming harder to get sand so I think that the desert could have a update of sand piles (like snow pines for aesthetics) that gives dust and quick sand that when mined it gives dust or the block if silk touched. Quicksand works like the liquid snow (but just suffocates).

Temples should spawn mummy's (like sea temples) what when killed should drop sand blocks and/or dust that can be turned in to sand (like snow balls).

Mommy's should only spawn around temples and should have the same health as zombies (10 hearts) and should be attracted to cats allowing for farms to be made as we already have renewable gravel allowing for concrete to be easily made.