Dreams of the Past M-772 vs. Pakkun N-1376

[Estate]

This is a timing question

Running a "Flip Effect" deck with kimono's and rock lee N-571. My opponent has Pakkun N-1376 already in play. During my turn i deploy deidara (younger days) N-1103. I already have n-571 and Dreams of the past M-772 in play. Now i activate N-571 effect flip a coin the results is tails. I indicated that i intend to activate my mission to re-flip the coin. At that time my opponent says "chain" an activate N-1376. I then chain to that with N-1103 and pay the cost. There are no more effects put onto the chain. therefore the chain starts to resolve. I flip a coin the results is tails and for the second time during my turn I indicate i want to activate M-772. My opponent states that since the chain has started to resolve and M-772 is already apart of the chain i can no longer (activate) add it's effects to the chain(even though it can be used twice per turn).
My question is was this the correct answer or am i able to use M-772 to re-flip the coin i flipped for N-1103? Unsure of the answer i went ahead and flipped (as another results of tails wouldn't change anything), the results was heads. Therefore when the chain resolves my opponent's N-1376 who was the target for my N-1103 is injured. Since Pakkun is injured and cant use his effect to negate M-772 i then re-flip for N-571 and the results is heads.

[Laughing_Man]

Originally Posted by Estate

This is a timing question

Running a "Flip Effect" deck with kimono's and rock lee N-571. My opponent has Pakkun N-1376 already in play. During my turn i deploy deidara (younger days) N-1103. I already have n-571 and Dreams of the past M-772 in play. Now i activate N-571 effect flip a coin the results is tails. I indicated that i intend to activate my mission to re-flip the coin. At that time my opponent says "chain" an activate N-1376. I then chain to that with N-1103 and pay the cost. There are no more effects put onto the chain. therefore the chain starts to resolve. I flip a coin the results is tails and for the second time during my turn I indicate i want to activate M-772. My opponent states that since the chain has started to resolve and M-772 is already apart of the chain i can no longer (activate) add it's effects to the chain(even though it can be used twice per turn).
My question is was this the correct answer or am i able to use M-772 to re-flip the coin i flipped for N-1103? Unsure of the answer i went ahead and flipped (as another results of tails wouldn't change anything), the results was heads. Therefore when the chain resolves my opponent's N-1376 who was the target for my N-1103 is injured. Since Pakkun is injured and cant use his effect to negate M-772 i then re-flip for N-571 and the results is heads.

First let me clarify a few things.
's 2nd effect (to reflip a coin) is a replacement effect. It is not templated like a replacement effect, but it should.
Also, n571 flips a coin on resolution. To use his effect, you declare that you are activating it and it goes on the chain. When the effect resolves, you flip a coin.

In your scenario, Pakkun would need to be activated before the any coins are flipped since a coin is flipped when the chain is resolving for both n571 and n1103.

To answer your question on whether or not you can use m772 to reflip a coin twice during the same chain, the answer is yes because it is technically a replacement effect.