{Spreading Plague} is out and doing its thing.
They have out a {Worldspine Wurm}
They cast a {Hornet Queen}
there should be nothing left right?
queen and hornets entering kills wurm and each other
wurm tokens enter and kill each other
all of this due to simultaneous entry right?
In short, yes you are correct. Everything dies. Long answer:
For reference in this post I'm making:
{Hornet Queen}
{Worldspine Wurm}
{Spreading Plague}
Ok, so first Hornet Queen enters and her ETB goes on the stack. The Plague triggers last since the triggers of whomever's turn it is Triggers first. Because the stack reaolves in reverse order, Plauge resolves first, leaving Queen as the only creature on the battlefield (Worldspine Wurm dies to Plague before the HQ's ability resolves).
Wurm triggers, and the wurms enter.
HQ resolves. 5 tokens enter. Each of those tokens enter at the same time, after the wurm etb resolves. so Plague can't do anything until they are all on the field. Once HQ resolves, Plague triggers 8 times (once for each token).
The first one resolves, killing everything green but one token. This token is now the only thing on the battlefield. However, there are still 4 triggers on Plague. The tokens dying does not remove the ability of Plague, because when a creature dies it is remembered as the last state it was in while on the battlefield. The charicteristic "green" is remembered by Plague's ability.
Once the next trigger resolves, there is nothing left on the battlefield, but there are still 6 triggers on Plague to kill all green creatures that are not the one that just died (so all of them on the battlefield). These triggers can be responded to just like normal triggers, but if you just let them resolve nothing will happen because there are no more creatures to destroy.
So, there's your answer. This example highlights another similar scenario:
If you cast {Cloudshift} on your creature in response to Plague's ability, your creature will be exiled, returned, and then it will die to Plague's ability because it is considered a new object, and Plague remembers the characteristics of the old one.
Quote from: Noblellama on April 25, 2016, 06:02:17 PM
So simultaneous entry doesn't kill the tokens?
example:
Hornet queen enters
then her tokens enter
she dies
but the tokens kill each other too right?
Simultaneous entry does kill each other. Queen etb resolves. Hornets all enter and all trigger. Each trigger kills the other ones that are left and they don't need the one that caused the trigger to be alive when it resolves.
Coffee vampire, note that you missed one trigger. When the wurms etb after fatty dies, they also trigger the enchantment. They will kill each other and hornet queen. Then insects enter and kill each other.
Buzz.