
Each player loses a third of their life, then discards a third of the cards in their hand, then sacrifices a third of the creatures they control of their choice, then sacrifices a third of the lands they control of their choice. Round up each time.
Pox has 5 printings, first in Ice Age (1995). EDHREC ranks it #9,892 among Commander cards. It appears most in Tergrid, God of Fright // Tergrid's Lantern decks (5,160 on EDHREC). It has 3 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.