Green Warden

I want to add a green warden with a special mechanic.

The model is the same as a regular Warden, but the skin is covered in a green bioluminescent vine.

Small mossy growths grow on the shoulders and back.

When activating abilities, it glows with a soft green light.

Height: 3 blocks

Width: 2 blocks

Spawning

Spawns in jungle biomes in villages.

Activation
If the player:

Right-clicks the green wardon,

and is holding the Heart of the Sea,

the following happens:

The Heart of the Sea disappears from the inventory.

Its body begins to glow brightly green for about 3 seconds.

After this, it becomes the player's ally.

Behavior while allied

Follows the player at a distance of 5 blocks.

Ability: "Green Guardian Beam"

Triggers once every 10 seconds, but only if the player has taken damage.

Green Warden:

Fires a green energy beam.
Healing the player: +4 hearts