As long as Thunderstaff is untapped, if a creature would deal combat damage to you, prevent 1 of that damage.
, : Attacking creatures get +1/+0 until end of turn.
ILLUSTRATED BY
Cliff Childs INTERVIEW
VALUE
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DAILY
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WEEKLY
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MONTHLY
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Standard
not legal
Modern
legal
Pauper
not legal
Legacy
legal
Vintage
legal
Commander
legal
Pioneer
not legal
RULINGS
2004-12-01
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.