Schematic card in 16% of packs
Id love to see more dredge in the future, but I know its something Wizards isnt keen to return to without some severe balancing, which means it probably wont happen
Sister of Silence This five-mana flashing 3/3 is pretty good
On the other hand, Theater of Horrors is generally a better Outpost Siege, since you have more time to play your exiled cards, though Siege does have the added flexibility of being able to be played as a win condition in Purphoros, God of the Forge decks and similar Go Wide decks
Changing creature types on vehicles is intriguing, but Im not sure thats worth pursuing
Those two cards are not only great getting your creatures tapped, they also give you something powerful to do with all those extra creature tokens, as you can use those Enchantments to start tapping down your opponents stuff, and things can snowball from there