Vigilence and tapping

[Mattao19]

Say I swing with my  {Anax and Cymede} and after declared attacks I tap them with {Springleaf Drum} to make {R} to play {Titan Strength} on it. Does this work?

[Remillo]

Sure.  Once a creature is declared as an attacker, it doesn't matter if it becomes tapped.  It'll still be attacking and still deal its damage.

[Mattao19]

Sure.  Once a creature is declared as an attacker, it doesn't matter if it becomes tapped.  It'll still be attacking and still deal its damage.

Awesome! Thanks dude for the quick reply!!

[Chargingswadger]

Quick reply, but he's incorrect. If you tap it down once it's an attacker it deals no damage that combat.

[Mattao19]

Quick reply, but he's incorrect. If you tap it down once it's an attacker it deals no damage that combat.

You sure?

[Chargingswadger]

I know it is with blocking, and quite sure it is with attacking.

[Rass]

Sure.  Once a creature is declared as an attacker, it doesn't matter if it becomes tapped.  It'll still be attacking and still deal its damage.

This is correct.

[Mattao19]

Sure.  Once a creature is declared as an attacker, it doesn't matter if it becomes tapped.  It'll still be attacking and still deal its damage.

This is correct.

That's what I thought. Just to be 100% can somebody provide a ruling

[Rass]

I know it is with blocking, and quite sure it is with attacking.

Not anymore. I think around 6-8th edition they changed it.

[Chargingswadger]

I just looked that up and saw it. It was the same With attacking until 10th edition. My mistakes.

[Rass]

506.4a: Once a creature has been declared as an attacking or blocking creature, spells or abilities that would have kept that creature from attacking or blocking don't remove the creature from combat.

Or better

506.4b: Tapping or untapping a creature that's already been declared as an attacker or blocker doesn't remove it from combat and doesn't prevent its combat damage.

[TheRagingMage]

Regeneration also both taps and removes the creature from combat.  If tapping the creature removed it from combat, then it wouldn't need to say "remove it from combat."
614.8.: Regeneration is a destruction-replacement effect. The word "instead" doesn't appear on the card but is implicit in the definition of regeneration. "Regenerate [permanent]" means "The next time [permanent] would be destroyed this turn, instead remove all damage marked on it and tap it. If it's an attacking or blocking creature, remove it from combat." Abilities that trigger from damage being dealt still trigger even if the permanent regenerates. See rule 701.12.