Allied mobs follow players around and protect them after being tamed.
Passive mobs will never attack the player.
Require a grass covered block to spawn, with the exception of Squid which spawns in water blocks.
Neutral mobs will not attack the player unless provoked.
Aggressive mobs will attack the player when in range.
Require a light level of 7 or less to spawn with the exception of Ghasts and Slimes.