Hi everyone. I'm currently making a map with the use of command blocks. I want monsters to drop custom loot without going into loot tables. I tried tutorials on this and none of them work, even when I copied the exact command shown in the tutorials. My goal is to make a zombie drop a iron block, but I want to achieve this only by using in game commands. I would really appreciate it if someone can show me how to do it.
Thank you for the answer. I always thought that doing this won't be too much of a hussle since there are way more complicated commands in Minecraft Vanilla that work just fine, but it looks like Mojang has completely turend towards loot tables now.