what happens when I lose control of creature after the attackers have been declared? does the creature still deal damage?
what happens when I lose control of creature after the attackers have been declared? does the creature still deal damage?
No. Once a creature changes controllers, it's removed from combat, and is no longer attacking or blocking.
Fluttershy is best pony.
if its before blocker step yet, could other player declare my own creature as a blocker?
Yes.
Fluttershy is best pony.
although most likely at that point, your creature would be tapped and would not be able to be chosen as a blocker (unless it has Vigilance, perhaps)