Echo Shard rarity and The Warden

One of the main issues that players report with the new Echo Shard item is it rarity. Since it can rarely be found in loot chests in the already rare Ancient Cities and is not renewable, it can be difficult to obtain, especially on servers. I propose to resolve this issue by making the Echo Shard renewable through an interaction with the Warden.

As the Echo Shard is supposed to be unique to the Ancient Cities, a player should first obtain at least one shard before he can farm them. The process would start by placing the shard down as a block, similar to Amethyst Clusters. The block has multiple growth stages, and drops multiple echo shards when it reaches the final growth stage.

The block can advance through its growth stages when a nearby warden locks on to a target and roars. As its name suggests, the Echo Shard can echo the Warden's roar. When it does so, it advances one growth stage.

In order to balance the renewability of Echo Shards, the Warden's roar will echo back to him, making him more angry and dangerous to his victim. This creates a high-risk high-reward situation for the player. The roar should also only grow one echo shard if multiple are nearby.