Echo Shard

Echo Shards are a resource in Hollow Knight: Shadowblade. They have no purpose on their own but can be used for other purposes.

Method of Obtaining
Echo Shards can only be obtained by killing a Warden. One shard will be dropped for each Warden kill.

Recovery Compass
Requires 8 echo shards and a compass. Giving these to Fireheart's tool smith will have him build you a recovery compass. The recovery compass will point to the area where Midzyas most recently died, allowing you to recover your items more easily. This item is utterly useless in Shadow Soul Mode as dying ends the run.

Shrieker Radar
Requires a Frost Beacon and 4 Echo Shards. This tool will highlight every Sculk Shrieker or Sensor within the room Midzyas is currently in.

Selling
Echo Shards can be sold to an unnamed relic collector for 500 copper each. It is recommended to do this if you have nothing else to use your Echo Shards on.