TIL] You can use chain command blocks as chunk loaders (15w34a) : r/ Minecraft
New Command Blocks for 1.9 (Impulse, Repeating, Chain) - Commands, Command Blocks and Functions - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
ELI5: How exactly do chain command blocks work? : r/Minecraft
Conditional Chain Command block wont work - Commands, Command Blocks and Functions - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum