Roll that replaces numbers < 4 with 4. (DnD 5e)

In our campaign we have a modifier for weapons that has damage rolls of 1, 2, or 3 replaced with 4, and I was wondering if there was something I could put in a weapon's damage roll section that would do this automatically.

Crystal Clover said: In our campaign we have a modifier for weapons that has damage rolls of 1, 2, or 3 replaced with 4, and I was wondering if there was something I could put in a weapon's damage roll section that would do this automatically. Hey there Clover, Sounds like something kh1 (Keep High 1) would work great for. Try something like: [[{1D8,4D1}kh1]] The 1D8 would be a placeholder for the weapon damage dice. For a Greatsword, just double everything then change kh1 with kh2 like so: [[{1D6,1D6,4D1,4D1}kh2]]

The kh/kl functions basically compares two rolls or two flat numbers to one another (hence the 4D1), then either returns the highest or the lowest of the two. Before the inline dice rolling, but outside the kh1 function, you can add modifiers.