In APP version the 3 coins are thrown at the same time. Each head give 1 kill.
In RL you throw a coin 3 times and count everytime it land on head.
Displaying all 3 coins is better to check what the results are(as you don't know if the person counting is/has a brainfail).
For the result it doesn't matter how it's done. 3 times is 3 times.
I didnt know if the player had to target however many monsters they want to destroy before they flip the coin(s). The wording is kind of confusing to me. I interpreted "can" as "up to but no more than" the decided number. So if the player wanted to flip 3 coins do they define that at the beginning of the effect? Or do just flip all 3 and then target the monsters separately depending on result?
Yeah, this card's effect does NOT target. It already has PSCT as shown by the ":" after "Once per turn", and under PSCT rules, if a card doesn't say "target", then it doesn't target.
This os clear since other Canon Monsters were used past days. They effect you able to Deal with is the coin toss, not the destruction. So unless Monsters are undestructible, If you allow the Flip you can't do nothing about It after this