How much does Prepare the Holy Myron cost in CK3?

Gold (varies) (patch 1.20.0.3).

Decision · Religious Decisions

Prepare the Holy Myron

Send your Court Chaplain to gather rare balsams and consecrate an Ampulla of Holy Myron, an Artifact whose charges are spent on holy anointments

variesGoldBy God Alone

Prepare the Holy Myron is a decision in Crusader Kings III (Religious Decisions). It costs Gold (varies). Cooldown: 10 years. Requirements as the game words them: Your Court Chaplain must be an available adult who is not already traveling, You must not already possess an Ampulla of Holy Myron and Your Court Chaplain is already gathering the balsams. It needs By God Alone. Patch 1.20.0.3, from game/common/decisions/dlc_decisions/pam/pam_decisions.txt.

Quick answers (3)

How much does Prepare the Holy Myron cost in CK3?: Gold (varies) (patch 1.20.0.3).
What are the requirements for Prepare the Holy Myron?: Your Court Chaplain must be an available adult who is not already traveling, You must not already possess an Ampulla of Holy Myron and Your Court Chaplain is already gathering the balsams; the full conditions are on the page (patch 1.20.0.3).
How long is the cooldown of Prepare the Holy Myron?: 10 years.

The sacred chrism cannot be blended from kitchen leavings. Scripture names its makings — …, sweet …, …, and … in pure olive oil — and each must be fetched from the land that grows it. The farther the expedition ranges, the richer the blend brought back for consecration. But the way is long and rarely kind; bandits and fevers may thin the batch, or claim its bearer.

Requirements

The lines the game itself shows for this decision's conditions:

Your Court Chaplain must be an available adult who is not already traveling
You must not already possess an Ampulla of Holy Myron
Your Court Chaplain is already gathering the balsams

Shown to a character when (is_shown) (8 lines of game script)

OR = {
	is_landed = yes
	government_has_flag = government_is_theocracy
}
rite ?= {
	rite_has_parameter = tenet_holy_myron_artifact
}
has_pam_dlc_trigger = yes

As written in game/common/decisions/dlc_decisions/pam/pam_decisions.txt.

Can be taken when (is_valid) (25 lines of game script)

custom_description = {
	text = pam_prepare_holy_myron_decision_needs_chaplain
	cp:councillor_court_chaplain ?= {
		is_available_adult = yes
		is_travelling = no
	}
}
custom_description = {
	text = pam_prepare_holy_myron_decision_already_owned
	pam_has_usable_holy_myron_trigger = no
}
custom_description = {
	text = pam_prepare_holy_myron_decision_journey_underway
	trigger_if = {
		limit = {
			has_variable = pam_holy_myron_journey_active
		}
		NOT = {
			var:pam_holy_myron_journey_active ?= {
				is_alive = yes
				is_travelling = yes
			}
		}
	}
}

As written in game/common/decisions/dlc_decisions/pam/pam_decisions.txt.

Effects

Your Court Chaplain sets out for C Jerusalem. Upon their return, a Common Ampulla of Holy Myron will be consecrated — if the road is kind
Your Court Chaplain sets out to gather the makings of the Holy Myron
Your Court Chaplain sets out for C Jerusalem and C Dhofar. Upon their return, a Masterwork Ampulla of Holy Myron will be consecrated — bandits or misfortune on the road may diminish the batch
Your Court Chaplain sets out for C Jerusalem, C Dhofar, and C Kerala. Upon their return, a Famed Ampulla of Holy Myron will be consecrated, with a …% chance of an Illustrious one instead — bandits or misfortune on the road may diminish the batch

Effect (180 lines of game script)

if = {
	limit = {
		scope:pam_myron_levant_journey = yes
	}
	custom_tooltip = pam_prepare_holy_myron_decision_levant_effect_tt
	send_interface_toast = {
		type = event_toast_effect_neutral
		title = pam_prepare_holy_myron_journey_toast
		left_icon = cp:councillor_court_chaplain
		custom_tooltip = pam_prepare_holy_myron_journey_toast_tt
	}
	hidden_effect = {
		set_variable = {
			name = pam_holy_myron_journey_active
			value = cp:councillor_court_chaplain
			years = 30
		}
		cp:councillor_court_chaplain = {
			set_variable = {
				name = pam_holy_myron_journey_tier
				value = 1
				years = 30
			}
			set_variable = {
				name = pam_holy_myron_liege
				value = root
				years = 30
			}
			set_variable = {
				name = pam_holy_myron_legs
				value = 0
				years = 30
			}
			set_variable = {
				name = pam_holy_myron_expected_legs
				value = 2
				years = 30
			}
			if = {
				limit = {
					location = title:c_jerusalem.title_province
				}
				change_variable = {
					name = pam_holy_myron_expected_legs
					subtract = 1
				}
			}
			add_character_modifier = {
				modifier = pam_holy_myron_pilgrim_modifier
				years = 30
			}
			start_travel_plan = {
				destination = title:c_jerusalem.title_province
				return_trip = yes
				on_arrival_event = pam_holy_myron.0010
				on_arrival_destinations = all
			}
		}
	}
}
else_if = {
	limit = {
		scope:pam_myron_arabia_journey = yes
	}
	custom_tooltip = pam_prepare_holy_myron_decision_arabia_effect_tt
	send_interface_toast = {
		type = event_toast_effect_neutral
		title = pam_prepare_holy_myron_journey_toast
		left_icon = cp:councillor_court_chaplain
		custom_tooltip = pam_prepare_holy_myron_journey_toast_tt
	}
	hidden_effect = {
		set_variable = {
			name = pam_holy_myron_journey_active
			value = cp:councillor_court_chaplain
			years = 30
		}
		cp:councillor_court_chaplain = {
			set_variable = {
				name = pam_holy_myron_journey_tier
				value = 2
				years = 30
			}
			set_variable = {
				name = pam_holy_myron_liege
				value = root
				years = 30
			}
			set_variable = {
				name = pam_holy_myron_legs
				value = 0
				years = 30
			}
			set_variable = {
				name = pam_holy_myron_expected_legs
				value = 3
				years = 30
			}
			if = {
				limit = {
					location = title:c_dhofar.title_province
				}
				change_variable = {
					name = pam_holy_myron_expected_legs
					subtract = 1
				}
			}
			add_character_modifier = {
				modifier = pam_holy_myron_pilgrim_modifier
				years = 30
			}
			start_travel_plan = {
				destination = title:c_jerusalem.title_province
				destination = title:c_dhofar.title_province
				return_trip = yes
				on_arrival_event = pam_holy_myron.0010
				on_arrival_destinations = all
			}
		}
	}
}
else = {
	custom_tooltip = pam_prepare_holy_myron_decision_india_effect_tt
	send_interface_toast = {
		type = event_toast_effect_neutral
		title = pam_prepare_holy_myron_journey_toast
		left_icon = cp:councillor_court_chaplain
		custom_tooltip = pam_prepare_holy_myron_journey_toast_tt
	}
	hidden_effect = {
		set_variable = {
			name = pam_holy_myron_journey_active
			value = cp:councillor_court_chaplain
			years = 30
		}
		cp:councillor_court_chaplain = {
			set_variable = {
				name = pam_holy_myron_journey_tier
				value = 3
				years = 30
			}
			set_variable = {
				name = pam_holy_myron_liege
				value = root
				years = 30
			}
			set_variable = {
				name = pam_holy_myron_legs
				value = 0
				years = 30
			}
			set_variable = {
				name = pam_holy_myron_expected_legs
				value = 4
				years = 30
			}
			if = {
				limit = {
					location = title:c_kerala.title_province
				}
				change_variable = {
					name = pam_holy_myron_expected_legs
					subtract = 1
				}
			}
			add_character_modifier = {
				modifier = pam_holy_myron_pilgrim_modifier
				years = 30
			}
			start_travel_plan = {
				destination = title:c_jerusalem.title_province
				destination = title:c_dhofar.title_province
				destination = title:c_kerala.title_province
				return_trip = yes
				on_arrival_event = pam_holy_myron.0010
				on_arrival_destinations = all
			}
		}
	}
}

As written in game/common/decisions/dlc_decisions/pam/pam_decisions.txt.

Source: game/common/decisions/dlc_decisions/pam/pam_decisions.txt and the English localisation, Crusader Kings III 1.20.0.3. “…” marks words the game fills in at play time (a name, a faith, a title).