Number 8 Language English Legal Formats Brawl, Commander, Competitive Brawl, Timeless Restricted Formats Vintage Not Legal Formats Alchemy, Modern, Pauper, Pioneer, Standard Banned Formats Historic, Legacy Rulings (6/8/2016) The "shuffle and put the card on top" is a single action
As long as Knife and Death is on the stack, players can't cast spells, activate abilities, or move their permanents
Yep, more expensive, not less
P/T Number 0 Language English Legal Formats Commander, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Modern, Pauper, Pioneer, Standard, Timeless Rulings (4/1/2008) You can search for any card with the creature type Goblin, including creature or kindred cards
The second set, Rise of the Floodborn , arrived a few months ago
It's not very hard to break it, of course -- just add in Phyrexian Arena and/or Pitiless Plunderer and that pesky mana requirement is resolved -- but at least Kels completely broken all by itself like Korvold, Fae-Cursed King