The Battle for the Mirari, a mysterious and powerful artifact, has ended. The mighty barbarian Kamahl has been embraced by the Krosan Forest and claims the Mirari in its name - but his trials aren't over yet. The Cabal still holds the continent of Otaria firmly in its merciless grip, and fearsome new threats have appeared along with a new enemy - Ixidor the master illusionist.
Play with a favorite classic block and compete for great prizes!
Onslaught Block Sealed Deck Tournament IV
START TIME: Saturday, October 3, 2009, 11:00 AM PDT / 1800 UTC.
SIZE: 33 players minimum, 512 players maximum.
DURATION: 6 rounds. Play in all six rounds, win or lose!
LOCATION: Premier Events room.
ADMISSION: 30 Event Tickets (tournament product will be supplied)
PRODUCT PROVIDED: 2 Onslaught™ (ONS) boosters, 2 Legions™ (LGN) boosters, and 2 Scourge™ (SCG) boosters.
PRIZE SUPPORT: Prizes are based on the total match points at the end of the tournament. Each match win awards 3 points and each loss awards 0 points.
| Points | Product Prize | QPs |
| 18 | 1 complete premium foil set – winner’s choice of any Onslaught block expansion | 3 |
| 15 | 15 booster packs (5 ONS, 5 LGN, 5 SCG) | 2 |
| 12 | 9 booster packs (3 ONS, 3 LGN, 3 SCG) | 1 |
| 9 | 3 booster packs (1 ONS, 1 LGN, 1 SCG) | 0 |
All players who participate in the Onslaught Block Sealed Deck Tournament IV will receive a copy of the following previously released avatars: Two-headed Giant of Foriys (MTGO 1st Anniversary avatar), Phage the Unstoppable (Legions release avatar), and Karona, False God (Scourge release avatar).