Let's say your opponent plays a Blood Moon and you have some type of Naturalize effect in hand (with all dual lands). You tap your lands in response and float the mana with the intention of destroying the Blood Moon after it resolves. Can your opponent then choose to leave their Main Phase in the hopes of your mana pool being drained so you can't cast your spell, or can you always respond to a declaration of phase change?
You get priority upon announcement of a phase change and because you have mana floating, they don't get priority back until you either use the mana or declare 0 mana or pass priority.
So in other words, you can cast naturalize before the phase ends and the combat step begins.
You can always respond to the declaration of a phase change. A phase only changes when all players pass while the stack is empty. So if they are in their Pre-combat Main Phase and play Blood Moon and pass priority, in response you float some green mana then pass priority so Blood Moon resolves. Then they pass priority again hoping you will not use your mana and let it go to waste, this is your chance to cast Naturalize with the floating mana. They will still be in their Pre-combat Main Phase so they will again have the option of casting noninstant spells before going to combat.
You can always respond to the declaration of a phase change. A phase only changes when all players pass while the stack is empty. So if they are in their Pre-combat Main Phase and play Blood Moon and pass priority, in response you float some green mana then pass priority so Blood Moon resolves. Then they pass priority again hoping you will not use your mana and let it go to waste, this is your chance to cast Naturalize with the floating mana. They will still be in their Pre-combat Main Phase so they will again have the option of casting noninstant spells before going to combat.
That's what I thought, but it's interesting because I've never actually seen anyone make this play (though I assume it has happened before).
So in other words, you can cast naturalize before the phase ends and the combat step begins.
That's what I thought, but it's interesting because I've never actually seen anyone make this play (though I assume it has happened before).
Okay, thanks folks.
30mins 12sec is when the action happens.
Spam warning issued (reviving a 6-months old thread to give an example of the already explained answer). -MadMage