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Message: <blockquote data-quote="Prakriti" data-source="post: 7085912" data-attributes="member: 6855149">THAC0 makes more sense than the present system. It clearly delineates the divide between what is possible with mundane armor and what is done with magic. This is represented by the cross over from positive to negative numbers. Once you hit -1 or -2 AC, you know you're in magical territory. With the present system, however, the divide is far less obvious. Plate mail and a shield in 5E is AC 20, and AC 0 in the old system. If you add in a magical ring of protection, then we go from 20 to 21 in 5E, and from 0 to -1 in 1E. The latter does a far, far better job of representing the supernatural forces at play. Also, I always saw AC as a reflection of one's vulnerability to attack. 10 AC = lots of vulnerabilities, whereas 0 AC = zero vulnerabilities. A character with 0 AC is covered from head to toe in plate mail, with a shield to boot. In that sense, 0 AC does a far better job of representing impregnable defenses than AC 20, which might as well be a number chosen completely at random. So yeah, THAC0 is better. Sorry if you can't see it for yourself. <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile    :)"  data-smilie="1"data-shortname=":)" /></blockquote>