Attack and block

[Killa cam 304]

If a 2/2 creature is declared an attacker, and then I declare a blocker that is 3/3, can then the attacker play an instant that puts a +2/+2 on the 2/2 attacker and kill my blocker? Or is the 2/2 creature considered blocked and can do no further damage?

[Clint9119]

If the card is castes at instant speed then yes the attacking creature will win and beat the 3/3

[Killa cam 304]

509.1h says that once an attacker has a blocker declared its consider blocked

[Keyeto]

509.1h says that once an attacker has a blocker declared its consider blocked

This is true, however, that simply means that the damage WILL be dealt to that creature, and the blocker cannot be changed. If someone were to play a card, such as {Giant Growth} the creature would get the bonus, and do the extra damage.

[Killa cam 304]

So what if it's not an instant but an enchantment that gives it a +2/+2, can that still be use after the declared block?

[Bleakone]

509.1h says that once an attacker has a blocker declared its consider blocked

The combat phase is made of different stages, the declare attackers stage, then any player can play any instants or abilities. The declare blockers stage, again a chance to play abilities and instants. Then comes the damage calculations stage. You can't respond with instants and abilities to this stage.

[Bleakone]

So what if it's not an instant but an enchantment that gives it a +2/+2, can that still be use after the declared block?

Not unless the player has some card which allows them to cast enchantments at instant speed. Only abilities and instants can be used in the combat phase

[Keyeto]

So what if it's not an instant but an enchantment that gives it a +2/+2, can that still be use after the declared block?

If the enchantment is {Marshall's Anthem} or a similar card, and is already in play, then the creature would already have the bonus. If the enchantment is more similar to {Shadow Lance} they could pay the mana after blockers are declared, but before damage is dealt, and give the creature the bonus.

[Killa cam 304]

Ok, next question, can I in response to the +2/+2 enchantment tap for my cards ability?

[Keyeto]

It would also help to remember that activated abilities, such as the one on {Shadow Lance} are all able to be used at instant speed, unless it says otherwise.

[Keyeto]

Ok, next question, can I in response to the +2/+2 enchantment tap for my cards ability?

Yes you can, unless the ability says otherwise.

[Bleakone]

Ok, next question, can I in response to the +2/+2 enchantment tap for my cards ability?

You can. If you are blocking, once your creatures have been assigned to block, it doesn't matter if they tap afterwards.

[Killa cam 304]

Final two questions, does a 2/2 creature with death touch die facing a 2/2 creature without? And does first strike beat death touch all together?

[Keyeto]

Final two questions, does a 2/2 creature with death touch die facing a 2/2 creature without? And does first strike beat death touch all together?

The creature with death touch would die. And yes, the first strike damage would kill the creature before it could deal damage.

Edit: I am using the same 2/2 vs 2/2 scenario for that last part. A 2/2 with first strike would die to a 4/4 with death touch.

[Killa cam 304]

Ok I lied, another question, say I get attacked by a 2/2 creature, and I block with a 3/3, and my opponent cast a +2/+2 instant on his 2/2 creature. If I have another creature besides the 3/3 who isn't blocking can I activate it's ability?