De Vil Manor - Cruelle's Estate can be beneficial to use with Peter Pan - Lost Boy Leader because Peter Pan can move to a Location and gains lore equal to a Location's lore once per turn
Later on, however, this can choke manabases in a big way, forcing players to rely on their mana rocks and mana dorks to play their spells instead of their lands
He plays sides and two-times his way around the board, making for interesting and complex gameplay
So long as a card was printed at common at any point, it is legal in the format (excluding acorn-stamped, illegal, and banned cards)
Who doesn't like a little extra value at no additional cost
Its decidedly worse beyond the first turn, but all ramp spells dwindle as the game goes on