in magic what is the creature with the largest power and toughness

[riolu]

what is the creature with the largest power and toughness in magic?

[Kappu1]

Well if you play Ajani Goldmane and don't get hit and make it two rounds you can put out a token that is equal to your life total thus giving you a 24/24 creature

It's really hard to say I have seen a few cards with tokens equal to X (being life total, number of X cards in graveyard and ect...).

[Twanos]

you can make a creature infinately big. In real cards it's Krosan Cloudscraper 13/13. In silver border it's BFM Big Furry Monster at 99/99