Thunderstaff

Artifact, 3 (3)
If Thunderstaff is untapped and a creature would deal combat damage to you, prevent 1 of that damage.

{2}, {T}: Attacking creatures get +1/+0 until end of turn.¹
Illus. Kaja Foglio

Gatherer Card Rulings [Nov 2009]

• 12/1/2004: If Thunderstaff is untapped, it prevents 1 damage from each creature, each time it would deal combat damage to you. So if three creatures with double strike attack you and aren't blocked, Thunderstaff will prevent a total of 6 damage.

Format Legality	Legal in Vintage, Legacy, Extended, MTGO Classic Banned in Standard
Printings (1/8)	Darksteel (Uncommon)