Instead of only stacking on modifiers that make the enemies tougher, there should be a small chance to encounter a positive modifier in addition to the existing modifiers. These modifiers should be revealed upon entering the echo node and give an “oh yes” feeling like getting a critical success when crafting. All these modifiers should only last for one node.
Some ideas for some modifiers.
Enemies drop 100-400% more gold.
A permanent ice beetle companion joins you in battle for this node.
You have 10-20% penetration against all resistances.
All unique drops have at least 1 legendary potential.
When you die you revive after 2 seconds. Can only trigger once.
Enemies grant 100-400% more experience.
Enemies have a higher chance to drop rare crafting materials.
You get 10-20% more attack/cast speed.
Spawn 1-2 additional reward chests at the end of the echo node.