Michiko Konda, Truth Seeker

• WWizards of the Coast2005-06-01
  Official Ruling
  One permanent is sacrificed each time an opponent’s source deals damage to Michiko Konda’s controller. The amount of damage doesn’t matter.
• WWizards of the Coast2005-06-01
  Official Ruling
  Spells that deal damage repeatedly trigger Michiko Konda’s ability each time they deal damage. For example, a Glacial Ray spliced onto another Glacial Ray triggers the ability twice (once for each “2 damage” event from the Glacial Ray).
• WWizards of the Coast2005-06-01
  Official Ruling
  Sources that deal damage multiple times (such as creatures with double strike) will trigger Michiko Konda multiple times.

Rulings via Scryfall