Valley of Dry Bones (Prophecies of Christ): You may release all captured Heroes and resurrect a Hero from each player. If a character is in battle, you may banish this card to take those Heroes to territory and add any number of those Heroes to battle.
I'm honestly not sure whether or not you could drop Valley during battle resolution after losing all your Heroes and jam a whole slew of new Heroes into the same battle before your opponent withdraws their blockers.
Since it's a Dominant, I can't really think of a reason why not, and yet I'm still unsure.
If you can, this card is I N S A N E
