ValkMC is custom coded, featuring plugins made by @smallbuilding (Valkryienyanko).
It features a remade/redone survival experience where the tools are actually different tiers.
Even punching trees have changed, you gets scraps of wood instead of oak logs, and most of the crafting will actually take place in your 2x2 grid in your inventory.
List of changes (Doesn't show ALL changes.):
1. Some more blocks are now affected by gravity.
2. Different survival mechanics making the game more fun and challenging.
3. Acidic water! Water will now poison you, so watch out.
4. A quickly changing and adapting server, with new content being added all the time.
5. A small RPG mechanic, where when you kill monsters, they drop souls which will level you up.
6. For more information, join the server/ask about stuff in the Discord.