i think that killing a dragon should have catastrophic nuclear-fallout level environmental consequences tbh. their blood should scorch and wither the earth with fire and poison, the toxic fumes released as they decay should choke the land and all nearby living creatures, and the entire landscape where they fell should be transformed into a blighted wasteland where bleached leviathan bones loom upwards out of the ground as a warning that can be seen from miles away, the boundary markers of an exclusion zone.
i also think that it would be wonderfully ironic if those who sought the fame and glory of the title of 'dragonslayer' only ended up with the bitter, enduring reminder of the devastation they're responsible for. this is not a place of honor. no highly esteemed deed is commemorated here.
