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This is up to the individual player, and often also the colour(s) of your deck, as well as the composition of it.
But for a quick and easy "beginner's advice" so to speak, try 1 in 3. (20 out of 60)
This should, in theory, give you a hand of 2 lands, with your 3rd coming up before you run out, in general 3 mana is enough to do something while you wait for more.
Once again, this doesn't always work, some decks need more before going optimal, and some have alternative ways of gaining it, and then some dedicate half their deck to digging up the other half.
It all depends.
(improved for math fail. =_=)
What else can I help you with?
Is a creature considered a spell in Magic: The Gathering?
No, a creature is not considered a spell in Magic: The Gathering.
Is a planeswalker considered a spell in Magic: The Gathering?
No, a planeswalker is not considered a spell in Magic: The Gathering.
Is there a way to counter an uncounterable spell in Magic: The Gathering?
In Magic: The Gathering, there are some cards that can counter spells that are normally uncounterable. These cards have specific abilities that allow them to counter even spells that cannot typically be countered.
Is an enchantment considered a spell in Magic: The Gathering?
Yes, an enchantment is considered a type of spell in Magic: The Gathering.
Is copying a spell considered casting it in Magic: The Gathering?
No, copying a spell is not considered casting it in Magic: The Gathering.
Does copying a spell in Magic: The Gathering count as casting it?
No, copying a spell in Magic: The Gathering does not count as casting it.
Is magic cards spell cards the same thing?
Spell cards and Magic cards are the same. The reason for the confusion is because Magic cards were changed to Spell cards during the release of Magician's Force.
Is "Valakut" a land or a spell in Magic: The Gathering?
"Valakut" is a land card in Magic: The Gathering.
Can you discard cards from the battlefield due to a special ability in Magic the Gathering?
Cards are not 'discarded' from the battlefield. When a spell, ability or cost tells you to discard cards, they must come from your hand.
What is the first spell that can counter a spell in Magic: The Gathering?
The first spell that can counter a spell in Magic: The Gathering is called "Counterspell." It allows a player to prevent an opponent's spell from taking effect.
Is "Island" a spell in Magic: The Gathering?
No, "Island" is not a spell in Magic: The Gathering. It is a basic land card that produces blue mana when tapped.
Can you target a planeswalker with a spell or ability in the game of Magic: The Gathering?
Yes, in the game of Magic: The Gathering, you can target a planeswalker with a spell or ability.
