AffinitySMP

Choose one affinity and live with it. Minecraft Affinity SMP gives every player a permanent elemental identity with its own spawn location, powers, weaknesses, and active abilities.
Air players leap higher, survive huge falls, launch wind charges, and begin on sky islands. Fire players thrive in the Nether, heal from flames and lava, smelt ores by eating them, and suffer in water. Water players breathe underwater, move with Dolphin’s Grace, resist guardians, and dry out on land. Sand players dominate deserts, burrow through sand, ignore cactus, and slow down in water. Nature players farm faster, tame easier, camouflage with leaf armor, grapple with vines, and are ignored by zombies and creepers. Ender players teleport freely, enchant from inventory, heal from End crystals, and use Dimensional Switches, but survive with only half health.
Affinities cannot be freely changed. To choose again, craft a Totem of Affinity, die with it, and sacrifice your inventory, experience, and Ender Chest contents.