Echo Pearl

An Echo Pearl would be crafted with an Ender Pearl and an Echo Shard like an Eye of Ender.

Its function would be that it could be placed and then activated remotely in some way with the effect of doubling the players effective chunk loading ability.

For instance, if you have a farm in one part of your world and you are in another part of your world you could activate the Echo Pearl for 5 minutes to have the chunks loaded in both places. Perhaps it would limit you in some way.

After the 5 minutes was up it would reappear in your inventory. If your inventory was full you would teleport and switch locations with the Echo Pearl and it would crystallise into a block that you would have to return to and mine to reclaim. This could potentially be a powerful tool for technical players.

Alternatively, the Echo Pearl could be placed somewhere in the world and then by using one in your inventory you could be teleported to the location you had placed the Echo Pearl previously. You would be limited by how many you can have in a similar vein to an Ender Chest.