A vanilla mechanic-focused Hardcore experience, with a few tweaks:
+ Spawn at random X, Z
+ A single-use teleport to let new players team up
+ Monthly mini-contests, usually on a statistic, with IRL cash prizes $10-150
+ Respawn after 48hr+ cooldown (but ALL player data files get reset)
Killing is allowed, so make sure you trust someone before teaming up!
Good luck, dont die, and have fun!
(For a non-hardcore vanilla server: leafcraft.org)