However, simply flooding the board with Soldiers isn't enough
You might take away their fourth land or their preferred three drop but that won't actually do anything for two or three turns which greatly reduces the value of Blackmail being one mana
When Silent-Blade Oni deals combat damage to a player, you can look at that player's hand, giving you tons of additional information
Not only will this create a very scary board, but its somewhat self-sustaining, keeping your hand full thanks to card draw on death
The second stage lets you loot away unneeded cards to hit Delirium on turn four, and a flipped Saga can put pressure on the opponent with a copy of Grim Flayer or Graveyard Trespasser
There are some other really nice cards, like the new board sweeper Exterminatus