My opponent can cast creatures at instant speed with his irelevant commander and uses 2 mana geeks with 1 toughness. I cast Black Sun's Zenith on my turn. During my turn he does so. Before Black Sun's Zenith he FLOATS the mana to cast the creatures instead of casting them adding them to the stack. The mana geeks die to the counters. Is he still floating the mana after the wipe?
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-MadMage
You wording is a little confusing here so I'm going to answer it as i understand it. Lands and certain creatures, and artifacts, provide mana. Activating a creature's mana ability, or tapping a land adds mana to you mana pool - this is generally an invisible zone in the game where available mana "floats" waiting to be used. Mana empties from the mana pool at the end of each phase. For example. If you tap a forest to add one green mana to your pool during your main phase, that mana will stay in your pool until you use it, or until you begin your combat phase.
It seems like you attempted to cast a wrath and your opponent decided to float mana from their dorks. That mana will continue to float in the "mana pool" until they (your opponent) decides to use it, but it will leave the pool (be wasted) when you move to your next phase. That being said, when you decide to move to your next phase, your opponent does then have the option to spend that mana - i.e. you can't be sneaky and say "I'm starting my combat phase, you lose the mana."
So to be more clear:
You cast Black Sun's Zenith
Your opponent taps their dorks to float mana.
Zenith resolves, killing the dorks.
The mana is still floating after Zenith resolves.
Your opponent has until your next phase to use the floating mana (via, as you say, casting a creature with flash).
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-MadMage
It seems like you attempted to cast a wrath and your opponent decided to float mana from their dorks. That mana will continue to float in the "mana pool" until they (your opponent) decides to use it, but it will leave the pool (be wasted) when you move to your next phase. That being said, when you decide to move to your next phase, your opponent does then have the option to spend that mana - i.e. you can't be sneaky and say "I'm starting my combat phase, you lose the mana."
So to be more clear:
You cast Black Sun's Zenith
Your opponent taps their dorks to float mana.
Zenith resolves, killing the dorks.
The mana is still floating after Zenith resolves.
Your opponent has until your next phase to use the floating mana (via, as you say, casting a creature with flash).
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