op 09 one piece booster box Card Game OP09 Four Emperors Each box contains 24 booster packs with 6 random cards. Emperors in the New World

Mirror Wall halves the attack power of any enemy monster that attacks you

Should you get to six or more enchantments, having the flexibility between playing a land or putting a creature on the battlefield (tapped) for free feels incredibly strong

Tri-Brigade After almost two years, Tri-Brigade is back to the forefront of the competitive scene with the inclusion of Spright

Often times decks that are playing this card are usually in either mono black or Dimir colors, so many of the creatures they play are much larger than Burn's creatures (such as Tolarian Terror and Gurmag Angler) so they will survive this effect

When it attacks, sacrifice it at end of combat.) Artifact Ramp (CTRL to add secondary) Sac Outlet Sac Outlet (CTRL to add secondary) Sac Payoff Sac Payoff (CTRL to add secondary) Treasure Ruthless Technomancer When this creature enters, you may sacrifice another creature you control

The average pull rate is estimated at 0.09% (about 1 card in 4 booster cases), making these grails the second hardest finds on this list