User blog comment:NicknameMy/Rework for Tiamat, new tier 3 tiamat/@comment-50.82.174.147-20120323204534/@comment-50.82.174.147-20120324151550

According to a red post by Xypherous, the AoE is technically physical and also technically true damage. The damage dealt to the champion hit with the auto attack is reduced by armor, the AoE is not. The AoE damage is based off of the damage dealt to the champion hit with the auto attack after armor calculations. So for example, say you hit a 100 armor annie with a 700 damage crit. The AoE calculation with one tiamat would be (armor calculation).50x700= 350 damage dealt to annie (tiamat calcuation) .50x350=175 splash damage dealt to nearby enemies. Yes the damage is physical, but the splash does NOT get reduced by armor and other damage reduction effects.