Cheapest priced copy (Urza's Saga): $0.69 at Card Kingdom, near mint, their price list as of .
Defensive Formation 
Enchantment · Uncommon · Urza's Saga · #9
Rather than the attacking player, you assign the combat damage of each creature attacking you. You can divide that creature's combat damage as you choose among any of the creatures blocking it.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.69 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The List | USG-9 | Uncommon | — | — |
| Urza's Saga | 9 | Uncommon | $0.69 | — |
One ruling from Wizards of the Coast
- 4 October 2004Damage assignment choices from Trample and other things which allow alternative damage assignments for attacking creatures are all made by you.