Entropy is a dominion-only item with the following description:
+275 Health +70 Attack Damage UNIQUE Passive: Your basic attacks have a 25% chance to reduce your target's Movement Speed by 30% for 2.5
seconds. UNIQUE Active: For the next 5 seconds, your basic attacks
reduce your target's Movement Speed by 30% and deal 80 true damage
over 2.5 seconds (60 second cooldown)
I'd like more specifics regarding the mechanics of the true damage from the active ability. How is the damage distributed over time? 16 damage every .5 sec? 40 damage every 1.25 sec? More importantly, does it stack?
Lets say I'm Yi and have an attack speed of 2.0 attacks per second. Will I get 800 true damage (from 10 attacks, stacking), 224 damage (16 true damage from the first tick of the dot for each of the first 9 attacks, plus 80 for the final attack), or something in the middle?
Best Answer
I am making the assumption that this ability works in the same way as Teemo's poison. They are mechanically the same in that they apply a DoT on autoattack, so that seems like a reasonable assumption. If that is true, the answer is:
In the middle. Over the 5 seconds, you will deal 16*10=160 damage due to time based stacks. That is to say, a 16 damage proc occurs every .5 seconds. You will also deal 16*9 for each individual hit after the first, because hitting triggers an instant 16 damage proc in addition to refreshing the time. You will still deal the rest of the 80 from the last hit, so an additional 64 damage. In total, if you attack for 5 seconds at 2.0 hits/second, you will deal 304 damage and have 64 more damage dealt over the next 2.5 seconds, adding to a total of...
386 true damage.
If you want the source for that calculation, go find the RIOT explanation of teemo's buff/bugfix a couple months ago. They made it clear that you deal damage based on the time of effect, plus one tick of damage based on each individual hit.
It is possible that the mechanics are different from Teemo's poison and the 16 damage may not be applied on hit. That would make the damage equal to 240.