Sift ideas

These have probably already been thought up by the wonderful team at Mojang, but I would like to share appreciation for the ideas nonetheless. First a wide variety of trees (if they are trees) to populate the biome. Second, a tameable mount with lots of health and possibly a charge attack, that is slower but not too much slower than regular mounts and immune to fall damage. A lush cave but sift (self explanatory). Third, ichor lakes with chance of treasure underneath (assuming ichor does damage). Finally something overworld ish, such as corrupted pillager outposts.