Regeneration is a creature ability most common on Green or Black creatures. It prevents a creature from being destroyed by paying the Regenerate mana cost, meaning the creature survives if it was originally going to be destroyed. Any damage dealt to the creature prior to being regenerated is removed. Any damage dealt to the creature after being regenerated remains until end of turn. There are creatures which can regenerate themselves or others and Enchantments which give a creature the Regenerate ability. There are non-Creature non-Enchantment cards which let you regenerate a creature. You need to pay (in most cases) a mana cost to regenerate a creature. Some times, you need to sacrifice a creature, or you may need to pay Life as well. You can regenerate a creature as many times as you want each turn for so long you can pay the cost. You have to pay the Regenerate cost each time it would be Regenerated.
When a creature CAN'T be regenerated.Edit
- When a creature's Toughness is reduced to 0, it is sent to the graveyard as a state-based effect.
- When a creature is returned to the hand of the controller/player/...
- When a creature is already in the graveyard. You can't use regeneration to rise the creatures from death, only to prevent it.
- When a card says it can't be regenerated. (example: Terror
- When a creature is sacrificed.
A creature that has been dealt lethal damage and been regenerated gets tapped afterwards. However, creatures who are already tapped still can be regenerated, but remain tapped.
Attacking after RegenerationEdit
When you regenerate a creature, you can attack in the same turn it was regenerated (and doesn't have Summoning Sickness or any other effect which says so) but only if you can get it untapped.
Deathtouch and RegenerationEdit
You can regenerate from Deathtouch by paying the regeneration cost.
If a creature blocking or blocked by a creature with Deathtouch is dealt enough combat damage to destroy it, its controller does not have to pay regeneration costs twice to keep it alive. One regeneration effect is enough to prevent both lethal damage and Deathtouch.
For more on this see Magic 2010 Rules Changes: http://www.wizards.com/magic/magazine/article.aspx?x=mtg/daily/feature/42a
Trample and RegenerationEdit
When a creature with Trample attacks and is blocked by a creature which can be regenerated, the creature can be regenerated, but regenerate does not prevent any damage done to that creature's controller from Trample.