disburse_hunt_legend_seeds

disburse_hunt_legend_seeds = {
	if = {
		limit = {
			is_ruler = yes
			has_dlc_feature = legends
			NOT = { has_game_rule = historical_legends_only }
		}
		if = {
			limit = {
				scope:activity.var:animal_type = flag:dragon
			}
			create_legend_seed = {
				type = heroic
				quality = famed
				chronicle = beast_slayer
				properties = {
					beast = flag:dragon
					location = root.location
				}
			}
		}
		else_if = {
			limit = {
				scope:activity.var:animal_type = flag:unicorn
			}
			create_legend_seed = {
				type = heroic
				quality = famed
				chronicle = beast_slayer
				properties = {
					beast = flag:unicorn
					location = root.location
				}
			}
		}
		else_if = {
			limit = {
				scope:activity.var:animal_type = flag:bear
			}
			random = {
				chance = 50
				create_legend_seed = {
					type = heroic
					quality = famed
					chronicle = beast_slayer
					properties = {
						beast = flag:bear
						location = root.location
					}
				}
			}
		}
		else_if = {
			limit = {
				OR = {
					scope:activity.var:animal_type = flag:tiger
					scope:activity.var:animal_type = flag:lion
					scope:activity.var:animal_type = flag:leopard
				}
			}
			random = {
				chance = 30
				create_legend_seed = {
					type = heroic
					quality = famed
					chronicle = beast_slayer
					properties = {
						beast = flag:ferocious_beast
						location = root.location
					}
				}
			}
		}
	}
}

As written in game/common/scripted_effects/06_dlc_ce1_legend_effects.txt.