Activating a spell speed 2 effect in opponent standby phase?

[KrystalLBX]

Not sure if this was changed but my friend wanted a confirmation.

Lets say he is playing nurse burn (like a true edge lord)

He goes first
1st turn: He sets Bad reaction to simochi and 3 gift cards.
2nd turn (his opponent's first turn): Opponent draws

Provided the opponent doesnt play any cards to start a chain, can my friend immediately chain 3 gift cards into Simochi for game?

[Zaziuma]

You can do it in their Draw Phase if you wanted to, it has to do with the way you structure a turn, you see, a player cannot change Phase or Turn unless the opponent agrees to it, as they are allowed to activate Fast Effects at these points, after the turn player has done an action, or chosen not to do an action. This is a document from Konami that explains this in detail, it's not too complicated after a quick read:

https://www.yugioh-card.com/ygo_cms/ygo ... page-1.pdf

[Hyde]

Heck a play like that you could do it as soon as they draw a card since you can respond to any action they take, including start of turn draw.