You can respond and tap your land to Port or LD and float the mana. Yes, you can tap to add mana in response. Sure you can, but mana pools empty at the end of every step and every phase. If your land gets ported on upkeep, you can use that mana right then in your upkeep or lose the chance for the rest of the turn.

Can you negate a land?

Since the land doesn’t go on the stack, it is never a spell, and players can’t respond to it with instants or activated abilities. Since you can’t respond to it, you can’t counterspell it.

Can you tap lands during your opponent’s turn?

The basic lands are permanents that can add to your mana pool. Since this is an activated ability, it can be used during your opponent’s turn.

Can you tap lands in response to split second?

Nothing can be done in response to split second besides tapping land. its the only thing faster. you can tap land while a split second spell is happening but you can’t cast a single thing til its done.

Is tapping a land an instant?

So yes, you can respond by playing an instant, tapping those three lands for mana to pay for it.

Can you tap lands at instant speed?

At that point, you have the opportunity to respond with things that can be done at “instant speed”, activating abilities and playing instants. So yes, you can respond by playing an instant, tapping those three lands for mana to pay for it.

What happens when you cast a spell on your opponent?

Not only will your opponent remain unaware of the spell you’re casting, but your mana will remain untapped for longer, which multiplies the number of possibilities that your opponent must consider, and might make him or her play more conservatively than they otherwise would.

What happens when you tap lands in Magic The Gathering?

When the spell is played from your hand, it subtracts the appropriate amount from your mana pool. Until Magic 2010, having excess mana at the end of your turn would cause “mana burn”, which does damage to you equal to however much is leftover. The Magic 2010 rules changes did away with this. You can tap lands for mana at almost any time.

When to cast your spells in Magic The Gathering?

Timing is very important when using instant-speed removal spells. When you wait, you can gather extra information, or you might even be able to goad your opponent into investing mana or an extra spell (like an Aura) into their creature before you kill it. However, waiting can also open the door to disaster.

When do you untap a permanent in Magic The Gathering?

When this creature enters the battlefield, you may untap target permanent. Emerge (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature’s mana value.) When you cast this spell, tap up to four target permanents. • Untap target permanent.