Damage based on target attribute [macro request/help] (D&D 5e)

Hi everyone. I think this'll be easy for most of you, but I'm having trouble with a macro. I want an attack of a creature to deal ( 2d8 + 4 + the Constitution modifier of the target or 1 whichever is higher ) in necrotic damage. How'd you guys do this? i nearly succeeded, but I'm struggling with the conditional part (i.e. Constitution mod or 1...). For now I'm using 2d8+4 + @{target|Target1|constitution_mod} though if the Constitution modifier of the target is negative it will reduce the total damage. Thanks in advance.

[[ { 2d8+4 + @{target|Target1|constitution_mod}, 1d1}kh1 ]]

The Aaron said: [[ { 2d8+4 + @{target|Target1|constitution_mod}, 1d1}kh1 ]] Thank you very much. Can you explain what you did?

I'm not the Aaron (hardly!) but that's called grouping rolls . It allows you to  perform a series of rolls, and then compare each roll to a common check (like a success roll). The 1d1 is in there because you can't compare integers. However 1d1 will always result in 1. You could also do 0d0+n, where n is whatever static value you want. The kh1 after the group tells the roller to keep the highest 1 roll. It will never return less than 1.

Thanks Keith, I was on my phone between kid things. =D  One thing to note is that if the grouping is only integers, you can use an integer constant, so: [[ {3+@{someIntegerAttribute}, 1}kh1 ]] Basically, if there are dice, they must all have dice.

That is something I have now learned. Thanks!