Onslaught block/Preconstructed theme decks

Onslaught block, comprising Onslaught, Legions, and Scourge, has 12 preconstructed theme decks, of which three are monocolored, 8 are bicolored, and one is tricolored.
Onslaught theme decks featured a new box design that readily displayed the decks' colors.
== Onslaught ==
== Legions ==
== Scourge ==