Regeneration

[Avodroc13]

I recently posted a topic entitled Borborygmos Enraged. (I would add this to the end of that post, but it's not showing up for me anymore.) I would like to ask about the discarding a land to deal 3 damage to to target creature or player.

If I were to discard 2 land and deal 6 damage to a 4/4, it would be put into the graveyard, correct? Well what if my opponent regenerated that 4/4? Would the 4/4 just tap and the damage is null? If that were to happen, could I then discard ANOTHER 2 land to kill it or would the regeneration still stand and my attempt to re-kill it, pointless?

For reference:  {Borborygmos Enraged}

[Pleeb]

Consider regeneration a protective bubble that prevents the creature from being destroyed. As long as the creature isn't being destroyed, the bubble is in tact. Once the creature is destroyed the bubble pops triggering all the alternate affects and is gone. Feel free to destroy the creature again.

[TheRagingMage]

For the exact ruling:

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.