Rite of Returning 1.0.76

Changes:
- Undead/shadow mobs within 64 blocks are drawn toward players in lich form.
- Nearby undead/shadow mobs receive Lich's Blessing while following the lich.
- If the lich has a valid enemy, nearby undead/shadow mobs target that enemy and help fight.
- Undead allies do not target the lich.
- Non-lich players are ignored by nearby undead/shadow mobs; if undead are targeting a non-lich player, the target is cleared.
- Lich aura no longer curses undead/shadow allies before blessing them.
