Thousand-year storm in a modern storm shell

Asked by Petrakib08 5 years ago

I am having trouble understanding the math here. So for example I have a storm count of 4 with thousand year storm in play, than I cast grapeshot. My grapeshot triggers 4 times dealing 4 damage. Than my thousand year storm triggers giving me 4 more copies that trigger themselves 4 times each. Am I understanding this interaction correctly?

Kogarashi says... Accepted answer #1

Please link cards using square brackets to make it easier to understand the question.

Thousand-Year Storm, Grapeshot

If you've cast four instants and/or sorceries previously in the turn (and no other spells), and have Thousand-Year Storm on the board, here's what happens: You cast Grapeshot. Both Grapeshot's Storm ability and the triggered ability of Thousand-Year Storm trigger, and as the controller of both triggers, you choose their order on the stack. Then, whichever copy you put on the stack last resolves (assuming no responses from other players), giving you four copies of Grapeshot. Then the other trigger resolves, giving you four more copies of Grapeshot. Assuming no other interactions, you now have eight copies plus the original, for a total of nine damage.

A few things of note:

First, none of the spell copies, either from Storm or from Thousand-Year Storm, will trigger a copying ability, as both copy abilities only trigger upon you casting a spell. These copies are put on the stack directly, not cast, so they can't trigger Storm/TYS.

Second, Thousand-Year Storm only tracks instants/sorceries cast previously during your turn. Storm, on the other hand, counts any spells. If you cast TYS, then Lightning Bolt, then Grapeshot all in a single turn, TYS only gives you one copy of Grapeshot and none of Lightning Bolt, but Grapeshot's Storm trigger gives you two copies because TYS counts as casting a spell for the purposes of Storm. Further, Storm will count any spell cast, not just spells cast by you, so if your opponent Counterspell's your Lightning Bolt in our hypothetical, then that's another copy of Grapeshot you get.

December 22, 2018 3:22 a.m.

Petrakib08 says... #2

Thank you. That really helps me understand. I literally tried this in my playgroup and we just sat around the table trying to walk through the process in our heads for half an hour.

December 22, 2018 12:53 p.m.

Rhadamanthus says... #3

Petrakib08: A correct answer to this question has been up for a while. I marked it as the "Accepted Answer" so that the thread can move out of the Unanswered queue. Please remember to take care of this yourself in the future.

December 31, 2018 3:24 p.m.

Gummy1313 says... #4

I think the Grapeshot will copy 24 times. The Grapeshot with storm ability itself will be cast 4 times. And each cast will trigger Thousand-Year Storm . The first time grapeshot 4 times, the second 5 times, then 6 times then 7 times. Given a total of 4+5+6+7=24

December 11, 2021 10:12 a.m.

Gummy1313 says... #5

I can't alter the answer. Thousand-Year Storm will also see each copy of a previous iteration. That means, given a storm of 4, and GS is copied 4 times First copy op Grapeshot : will be copied 4 times by TYS Second copy of GS : TYS will see the 4 spells from before (Storm count) + 4 copies of GS from the first round. Casting 8 copies of GS. Third copy of GS : 4 + 8 = 12 copies Fourth copy of GS : 4 + 8 + 12 = 24 copies
Thus the end total would be 48 copies of Grapeshot cast

December 11, 2021 11:48 a.m.

Rhadamanthus says... #6

Gummy1313: Thousand-Year Storm and the Storm ability on Grapeshot trigger when the spell is cast. Copies of a spell don't count as being "cast" (otherwise Grapeshot would go infinite with itself).

When Grapeshot is cast in this example, its Storm ability triggers and the ability of Thousand Year Storm triggers. Grapeshot creates 4 copies of itself and Thousand Year Storm creates 4 more. The Storm abilities on the copies don't trigger because they weren't cast, and neither does the ability of Thousand Year Storm, for the same reason.

December 13, 2021 9:32 a.m.

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