2 Mike, the Dungeon Master Mike, the Dungeon Master is a 2/2 human that costs one generic, one green, and one white, and he is an absolute powerhouse You can pay two generic mana and tap Mike to return a creature that was put into your graveyard this turn straight onto the battlefield
This means players can easily sort their cards into sections, either by the ink color suggested on the divider or perhaps into sets or characters, franchises, or whatever their organizational collector's mind desires
Glint-Sleeve Siphoner: "draw a card" OK, this is just great
Throw as much mana as you can into it, and it provides a solid body that can threaten immediately with haste, ignore chumps with trample, and defend against retaliation thanks to vigilance
The Witch-king can also be granted Indestructible until the end of the turn by discarding a card and tapping the creature
With a high ink cost (7), but a fair bit of Strength (4) and Willpower (7), his biggest boon is arguably the "Hire A Crew" ability