Stamp of the Betrayer

[MattCaspermeyer]

It is located on line 792 of ARENA.LUA:

    if (receiver_name == attacker_name) then
      sdmg = sdmg*(1 + tonumber(hero_item_count("sp_branding_iron")/100))
    end

What is weird is that the same units have to be attacking each other, which doesn't match your description.

I guess the description should say +20% damage when attacking an enemy unit that is the same as your unit.

Anyway, there you go.

/C\/C\