<p>It would have summoning sickness but that doesn't prevent being able to block. Summonning sickness only deals with being able to use abilities with the (un)tap symbol and declaring as attackers. So yes, you can block with it.</p>

CC BY-SA 3.0
2014-02-07T08:48:07.793Z
2014-02-07T08:48:07.793Z
Ivo
<p>Summoning sickness means it can't be tapped. You can still use it to block an attacking creature. Just remember to flash it in at the end of the declare attackers step!</p>

CC BY-SA 3.0
2014-02-07T14:44:10.333Z
Summoning sickness does not prevent tapping. e.g. You can [Twiddle](http://magiccards.info/8e/en/111.html) a creature with summoning sickness. You can even tap a creature with summoning sickness to pay the cost of [Aboshan, Cephalid Emperor](http://magiccards.info/od/en/58.html)'s ability.
ikegami
CC BY-SA 3.0
2014-02-07T17:34:37.020Z
I think people internally think of "attack or activate an ability with the tap symbol in its cost" as "tap" (as in the creature taps itself, as opposed to "become tapped") because the former phrase is so long. It's unfortunate that the precise wording is impractically long in this case.
Cascabel
CC BY-SA 3.0
2014-02-08T16:08:02.013Z
@Jefromi, Makes sense, but you gotta be more precise when speaking as an authority (e.g. when answering a rules question).
ikegami
CC BY-SA 3.0
2014-02-07T08:56:31.180Z
2014-02-07T08:56:31.180Z
Ivo Geersen
<p>If you flash the creature in during the Declare Attackers step or earlier, you can block with that creature. You can do it after attackers are declared, but it's too late once blockers have been declared.</p>

<hr>

<p>"Summoning sickness" prevents three things:</p>

<ul>
<li>Declaring the sick creature as an attacker.</li>
<li>Activating abilities of a sick creature with the tap symbol (aka {T}) in their cost.</li>
<li>Activating abilities of a sick creature with the untap symbol (aka {Q}) in their cost.</li>
</ul>

<p>Blocking is permitted.</p>

CC BY-SA 3.0
2014-02-07T14:41:59.420Z
I never knew that summoning sickness prevented you from using abilities with the untap symbol in their cost. Though I've never personally played with any such cards.
GendoIkari
CC BY-SA 3.0
2014-02-07T14:39:06.330Z
2014-02-07T14:47:21.610Z
2014-02-07T14:47:21.610Z
ikegami
<p>If I summon a creature with the flash rule in my opponent's turn as a response to their attack is it able to block?</p>

<p>Or is it suffering from summoning sickness and can't do anything?</p>

CC BY-SA 3.0
2014-02-07T14:57:55.267Z
Judge's Corner on Youtube has a wonderful video covering Summoning Sickness. I strongly recommend watching the entire series if you are new and want to understand the deeper mechanics of the game. http://www.youtube.com/watch?v=asYHxwoElIM
Rainbolt
<magic-the-gathering>
Can a flashed creature block?
Liath
# Can a flashed creature block?

(Asked by: username_0 on 2014-02-07)

If I summon a creature with the flash rule in my opponent's turn as a response to their attack is it able to block?

Or is it suffering from summoning sickness and can't do anything?

**Tags:** magic-the-gathering

> **Comments:**
> **username_1**: Judge's Corner on Youtube has a wonderful video covering Summoning Sickness. I strongly recommend watching the entire series if you are new and want to understand the deeper mechanics of the game. http://www.youtube.com/watch?v=asYHxwoElIM  

---

## 3 answers

### Answer by username_4 on 2014-02-07. Score: 11 | Accepted answer

If you flash the creature in during the Declare Attackers step or earlier, you can block with that creature. You can do it after attackers are declared, but it's too late once blockers have been declared.

---

"Summoning sickness" prevents three things:

* Declaring the sick creature as an attacker.
* Activating abilities of a sick creature with the tap symbol (aka {T}) in their cost.
* Activating abilities of a sick creature with the untap symbol (aka {Q}) in their cost.

Blocking is permitted.

> **Comments:**
> **username_6**: I never knew that summoning sickness prevented you from using abilities with the untap symbol in their cost. Though I've never personally played with any such cards.  

---

### Answer by username_2 on 2014-02-07. Score: 4

It would have summoning sickness but that doesn't prevent being able to block. Summonning sickness only deals with being able to use abilities with the (un)tap symbol and declaring as attackers. So yes, you can block with it.


---

### Answer by username_3 on 2014-02-07. Score: 1

Summoning sickness means it can't be tapped. You can still use it to block an attacking creature. Just remember to flash it in at the end of the declare attackers step!

> **Comments:**
> **username_4**: Summoning sickness does not prevent tapping. e.g. You can [Twiddle](http://magiccards.info/8e/en/111.html) a creature with summoning sickness. You can even tap a creature with summoning sickness to pay the cost of [Aboshan, Cephalid Emperor](http://magiccards.info/od/en/58.html)'s ability.  
> **username_5**: I think people internally think of "attack or activate an ability with the tap symbol in its cost" as "tap" (as in the creature taps itself, as opposed to "become tapped") because the former phrase is so long. It's unfortunate that the precise wording is impractically long in this case.  
> **username_4**: @Jefromi, Makes sense, but you gotta be more precise when speaking as an authority (e.g. when answering a rules question).  

---

