help. How to achieve Dungeon Town Mutare's specialty.

help. How to achieve Dungeon Town Mutare’s 无标题 specialty.

See https://wiki.vcmi.eu/Hero_Format and https://wiki.vcmi.eu/Bonus_Format for a general description.
The specialty for Mutare below is from my branch, which updates the format, so you will need to tweak it a bit to work with the current release - but I’m guessing that all you’re after is the “for all dragons” limiter which is the same as always:

	"specialty" : {
		"base" : {
			"limiters" : [
				{
					"parameters" : [ "DRAGON_NATURE" ],
					"type" : "HAS_ANOTHER_BONUS_LIMITER"
				}
			],
			"type" : "PRIMARY_SKILL",
			"val" : 5
		},
		"bonuses" : {
			"attack" : { "subtype" : "primSkill.attack" },
			"defence" : { "subtype" : "primSkill.defence" }
		}
	}