Critical Damage Multiplier Macro

I have an npc I'm working on that has an increased damage multiplier on its damage. I can't seem to figure out how to change this in the attributes tab of the npc character sheet. I might need an api but I've scoured roll20 forus and its reddit and cant seem to find an answer. Can someone help? 

Hi Chris H.,  Which character sheet are you using? 

2014 5e by r20

The NPC version of the D&D 5e 2014 by Roll20 sheet cannot have a different critical hit damage on the sheet itself.  You have two options:  1) Put in a note in the description to roll or state what the damage is on a critical hit.  2) Create a macro for the attack and in the macro put the modified critical hit damage, then use the macro instead of the sheet's button.

How would I go about making the macro for option 2?

Click the attack button on the NPC sheet Go to the chat box where you type, click that hit the up arrow on your keyboard copy that and paste the code here.  Then we modify the code the way you want, and you put that back on the character as an Ability macro.

@{Shiva|wtype}&{template:npcatk} {{attack=1}} {{damage=1}} {{dmg1flag=1}} {{dmg2flag=1}}  @{Shiva|npc_name_flag} {{rname=[Fan of knives](~-OiiBhNYL-8crAmIcjQb|repeating_npcaction_-OinPsbC4rs2D87Za-YS_npc_dmg)}} {{rnamec=[Fan of knives](~-OiiBhNYL-8crAmIcjQb|repeating_npcaction_-OinPsbC4rs2D87Za-YS_npc_crit)}} {{type=[^{attack-u}](~-OiiBhNYL-8crAmIcjQb|repeating_npcaction_-OinPsbC4rs2D87Za-YS_npc_dmg)}} {{typec=[^{attack-u}](~-OiiBhNYL-8crAmIcjQb|repeating_npcaction_-OinPsbC4rs2D87Za-YS_npc_crit)}} {{r1=[[@{Shiva|d20}+(18+0)]]}} @{Shiva|rtype}+(18+0)]]}} @{Shiva|charname_output} There is the code. But, I dont see where the multiplier is.

Sorry, I didn't see this when you posted it (Roll20 doesn't ping on responses).  To clarify, do you want an increased critical threshold (ie: criticals on a 19 instead of 20) or do you want to change the critical damage rolled? If it is increased threshold (bolded are the changes):  @{Shiva|wtype}&{template:npcatk} {{attack=1}} {{damage=1}} {{dmg1flag=1}} {{dmg2flag=1}}  @{Shiva|npc_name_flag} {{rname=[Fan of knives](~-OiiBhNYL-8crAmIcjQb|repeating_npcaction_-OinPsbC4rs2D87Za-YS_npc_dmg)}} {{rnamec=[Fan of knives](~-OiiBhNYL-8crAmIcjQb|repeating_npcaction_-OinPsbC4rs2D87Za-YS_npc_crit)}} {{type=[^{attack-u}](~-OiiBhNYL-8crAmIcjQb|repeating_npcaction_-OinPsbC4rs2D87Za-YS_npc_dmg)}} {{typec=[^{attack-u}](~-OiiBhNYL-8crAmIcjQb|repeating_npcaction_-OinPsbC4rs2D87Za-YS_npc_crit)}} {{r1=[[@{Shiva|d20} cs>19  +(18+0)]]}} @{Shiva|rtype} cs>19 +(18+0)]]}} @{Shiva|charname_output} If it is increased critical damage then you will need to switch to automatically rolling damage on this character and repost the template as there is no way to modify it when not automatically rolling damage.