It gains "At the beginning of your upkeep, if this card is exiled, remove a hone counter from it" and "When the last hone counter is removed from this card, if it's exiled, you may cast it
Quirion Dryad is a perfect example that we've got plenty of space left
I also really like the synergy of foretell with other firebending cards (you can foretell at any point during your turn, even during combat)
However, Tower Defense has really snuck under the radar of a lot of players, and it's essentially a +5/+5 pump spell for the crew for just two mana if you're attacking
If a face-down spell leaves the stack and goes to any zone other than the battlefield (if it was countered, for example), you must reveal it
If you dont want to leverage the political aspect, try to pick a player whos not likely to have giant monsters to go toe-to-toe with yours