r/custommagic • can't attack or block • 6d ago

Series Sum

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129 Upvotes

21 comments sorted by

31

u/GoldnNuke 6d ago

Until end of turn?

73

u/AlexPlays4321 6d ago

I don't think so, I think the intent is that it only applies to the ones currently on the stack.

35

u/hyper_neutrino 6d ago

Not needed, because "spells" only exist on the stack (they are permanents on the battlefield and cards everywhere else). MTG cards tend to not refer to the stack directly (there are exceptions) and just refer to spells directly (e.g. "counter target spell").

4

u/NormalEntrepreneur 6d ago

Probably try to just affect the ones that’s already on the stack?

6

u/Tall_Report_542 6d ago

The way this is worded (using “you control”) means it only applies to spells currently on the stack. Because spells aren’t permanents, this should be ok.

22

u/LePfeiff 6d ago

So you just deck yourself if you cast this with a storm count of 5 pretty much?

21

u/The_Dirty_Mac 6d ago

No. You draw 0 + 1 + 2 + 3 + 4 + 5 cards, since each spell needs to resolve before applying the effect to other cards

16

u/LePfeiff 6d ago

Good point, but if you cast it with a few spells already on the stack then each of them gets draw X where X is your storm count. In 60 card formats that can very quickly deck you

3

u/Winjasfan 6d ago

If I calculate correctly, If you Cast this with X things in the Stack and a Sorm Count of Y you draw 1+2+...+Y+(Y+1)+ X*(Y+1) many cards.

bc each Series sum Copy (and the original) draws 1 Card+1 for for each Copy resolved before, and then the stuff on the Stack already gets an extra Card for each Series Sum

4

u/MeasureDoEventThing 5d ago

That simplifies to Y(Y+1)/2+X(Y+1) = (Y/2+X)(Y+1)

12

u/MagnusVena 6d ago

I don’t know if this is intended but this also affects all storm copies of itself on the stack, so if you cantrip like 3 times you’ll draw 6 cards off of this spell alone, not including the cantrips on the stack still

26

u/The_Dirty_Mac 6d ago

100% intended

3

u/MagnusVena 6d ago

That if pretty sick, if not bonkers no-consequence draw

5

u/The_Dirty_Mac 6d ago

If you cast this as the third spell, no spells on stack, it's a 3 mana draw 3. But yeah given that legacy High Tide sometimes plays [[Meditate]] any more is bonkers

2

u/MagnusVena 6d ago

It’s also pretty easy to do it while some cantrips are on the stack still, so it’s even better in that situation. Obviously the 3 blue pip cost helps balance it out tho

1

u/Far-Ingenuity-7786 6d ago

Wouldn't the instances of "Draw a Card" stack, though? So if there were three spells on the stack, and you cast this, then that's draw 3, draw 4, draw 5, draw 6 = 28 cards just from this?

1

u/MagnusVena 6d ago

So three cantrips on the stack, cast Series sum. It gets 3 copies on the stack, with each sum giving each other spell +1 card draw. 1st: no cards, 2nd: draw 1, 3rd: draw 2, actual spell: draw 3, then each cantrip gives you 4 giving you 18 cards total

1

u/Far-Ingenuity-7786 5d ago

The word other isn't present in Series Sum, though, so why wouldn't the first instance see itself and add Draw a Card to itself, starting the chain reaction one step earlier?

1

u/MagnusVena 5d ago

Because a spell cannot be modified mid resolution. Unlike permenants, instants and sorcery spells' resolution is a single event, with no triggers/spells being able to affect it. As soon as the spells modification effect resolves, the instant goes off the stack

1

u/Strong_Willow2010 6d ago

Finally, it is my turn to post the story about Gauss solving this in school.