Arc Warden has a couple of responses which could be used at some places.

1. The Arcwar_kill_22 response, "All that is green returns to dust." could be used as a rivalry line towards Treant Protector/Nature's Prophet.

2. The following responses could be used as deny responses.

3. The following lines could be used upon the Tempest Double dying (similar to how Lone Druid and Visage respond to their summons dying).