- ↓ 0.09
- ꩜ 0.25
- ↑ 13.16

{F}{C} → Stone Barrage : 10×

Flip a coin until you get tails. This attack does 10 damage times the number of heads.

illus. Kagemaru Himeno · LV.16

Formats: Other: 1999–2001

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Found in fields and mountains. Mistaking them for boulders, people often step or trip on them.

feyblade

The art seems to be letting you know, already, just how terrible this card is. He can’t attack you by punching, as his only attack is “stone barrage,” so we can just discount that as a little gesture on his part. All seven stones in the barrage are aimed at angles away from geodude, who is presumably facing his opponent. Yes, you flipped tails, and your two energy attack did nothing.

For the record, Stone barrage averages at about 10 damage per turn.

Dr. λ the Creator of Variables, Binder of Variables, Applicator of Terms, Checker of Types, and β-Reducer of β-Redexes

Define n to go from 1 to infinite. The average amount of heads is Σ1/2^n. And Σ1/2^n has 1 as a limit which means that the average amount of heads is 1. And since the attack does 10 damage per heads the average amount of damage is 1*10 that is 10.

A way of viewing this is that when using this attack one has 1/2 chance to get 1 heads, 1/4 chance to get 2 heads, 1/8 chance to get 3 heads, etc. So in general one has 1/2^n chance to get n heads for every n in the range from 1 to infinite. when adding these together the number gets closer to 1 the more you add. and since there are infinite numbers to add the answer gets infinitely close to 1 and thus is 1 for all practical purposes. Therefore the average is 1 heads and since the damage per head is 10 the average is 1*10 damage.