The key here is that the rules text doesn't state it has to be a permanent you control, nor does it have to be a nonland permanent, so this should even trigger when copies of Fabled Passage or Demolition Field are activated
and astrology: meet Therions
You can only use each effect of "Tearlaments Merrli" once per turn
Its a showcase of Gardevoirs enduring presence within the TCG
The investigators travel through the city, avoiding or fighting the monsters that enter through the gates, visiting city locations to acquire tools, and ultimately entering the gates
ripoffs - this was just crying out to be "Super Perfect Supreme Ultimate Mega Ultra Great Moth." :P Anyway, making this more a wall than a beatstick is an interesting take on it, especially since Insects tend to prefer their effects to actual combat IIRC