This adds a new mechanic into the game, limited lives. When you die you lose one these lives (shown in the bottom left). You can craft more of these lives using cake, emerald blocks, and diamonds. When all 5 lives have been used and you die, you end up in the after life. Hopefully you have set up a Soul Transporter by now (Only one can exist per world.) because that is the only way to use the soul gems found in the after life to get back.
Ethereal Logs, Ghost Lilys and Soulite can be found in the afterlife to make more complex lives. JEI or another recipe browser is recommended.
Current Lives list -
Resistant Life - On death it becomes a normal life
Totem Life - On death it prevents the damage that killed the player and completely heals the user
Normal Life - On death it is removed
Zombie Life - Causes the source of the death to become poisoned and withered
Ghost Life - When the player respawns it give the ghost effect which allows flight and prevents damage
Vampire Life - On killing another player the vampire life is replaced with a normal life and another normal life is gained
Added Soul Fishing, Mountain Biome, Desert Biome, New Lives
Wanting to expand soul fishing, add more lives and spice up the biomes.