No, you cannot attack with the Mutavault this turn (nor can you tap it for mana after you make it a creature.) You will have to wait until it begins your turn in play under your control.
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Note that 'summoning sickness' is not really a term, but a shortened concept of a rule that does not allow creatures to attack or tap unless you've controlled it since the beginning of your turn. It only affects creatures.
If it only affects creatures, then lands don't "have it."
The rule is "Creatures that have not been under your control since the beginning of your most recent turn cannot attack or use abilities with in the cost."
When you play mutavault and turn it into a creature, the rule applies, since it is a creature and it has not been under your control since the beginning of your most recent turn.
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The rule is "Creatures that have not been under your control since the beginning of your most recent turn cannot attack or use abilities with in the cost."
Shouldn't it technically be "Creatures that have not been a permanent under your control since the beginning of your most recent turn cannot attack or use abilities with the tap symbol in the cost"? I only ask this because, if it wasn't, wouldn't it be impossible to attack with Mutavault since it would be impossible to actually control it as a creature since the beginning of your most recent turn? -Jack
What Sutherlands posted is an acceptably abbreviated version of the real rule:
212.3f A creature’s activated ability with the tap symbol in its activation cost can’t be played unless the creature has been under its controller’s control since the start of his or her most recent turn. A creature can’t attack unless it has been under its controller’s control since the start of his or her most recent turn. This rule is informally called the “summoning sickness” rule. Ignore this rule for creatures with haste (see rule 502.5).
It's true that this rule only cares how long the permanent has been in play under your control, and not necessarily how long that permanent has been a creature (only that it is a creature at the time you try to attack or use a T ability).
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Being a "creature that has not been under your control since the beginning of your most recent turn" requires it to be 2 things:
1) A creature
2) Has not been under your control since the beginning of your most recent turn
Changing it from a land to a creature changes the first one, but it does not change the second one.
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Hey, you! Yeah, you behind the computer screen! You're unconstitutional.
From what I was taught, everything technically has "summoning sickness", but it only usually matters is if it is a creature. The reason i was taught this way is because of effects like Mutavault or anything else that makes a noncreature a creature.
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Note that 'summoning sickness' is not really a term, but a shortened concept of a rule that does not allow creatures to attack or tap unless you've controlled it since the beginning of your turn. It only affects creatures.
The rule is "Creatures that have not been under your control since the beginning of your most recent turn cannot attack or use abilities with in the cost."
When you play mutavault and turn it into a creature, the rule applies, since it is a creature and it has not been under your control since the beginning of your most recent turn.
Hey, you! Yeah, you behind the computer screen! You're unconstitutional.
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It's true that this rule only cares how long the permanent has been in play under your control, and not necessarily how long that permanent has been a creature (only that it is a creature at the time you try to attack or use a T ability).
1) A creature
2) Has not been under your control since the beginning of your most recent turn
Changing it from a land to a creature changes the first one, but it does not change the second one.
Hey, you! Yeah, you behind the computer screen! You're unconstitutional.
America == Velociraptor
Play IRC mafia. (/join #mafia)
yes. just like mishra's factory, treetop village, faerie conclave and every other manland
Hey, you! Yeah, you behind the computer screen! You're unconstitutional.
America == Velociraptor
Play IRC mafia. (/join #mafia)