Dipping/coating your weapon takes a bonus action instead of an action. Also you can use fire to add 1d4 fire damage instead of poison. (Yes, Basic Poison is described in the PHB and explicitly says you can coat your weapon with it as an Action for additional 1d4 damage added to the attack.)
Brilliant! Adding now.
"Old time love song will die so swiftly. You never trust me- For a while it was nice, but it's time to say bye....
I'm cold, you're so cold- You're so cold, you're so cold- No-no-no, cold, you're so cold...."