For example /trail hearts(the cat is now gone thanks for telling me it existed not like I realized this)
New permissions nodes
For players that want to use it on themselves smoketrail.use.* or for a specific trail smoketrail.use.trailname for example smoketrail.use.fire
For players that want to use it on other players smoketrail.other.* or smoketrail.other.fire
You are only able to use one trail at a time because even though it looks cool it may cause damage to your server, I don't want that and neither do you.