There's a bunch, but the most common and straightforward ones are simply cards with converted mana costs 6 or higher
One thing thats common among many of these Wraiths is the swampwalk ability, so if you have an Urborg, Tomb of Yawgmoth, youll definitely want to toss one in your deck
Later, once we established that the Knight deck would be about Equipment, this card became key for that deck as well
Well it's too rich for our little toy store, but you can get them on Amazon here: Okay lets be honest, $1,500 is probably out of the budget for most people
It only takes three defense counters to defeat, tying it for the least among the battles, which is also solid, and then the backside is fine, as a 4/4 that can make some extra mana