Baited Hook

Card text1 Energy + [Order], Exhaust: Kill a friendly unit. Look at the top 5 cards of your Main Deck. You may banish a unit from among them that has Might up to 1 more than the killed unit and play it, ignoring its cost. Then recycle the rest.

Trade a unit that's done its job for a bigger one off the top of your deck, for two runes. The bigger the unit you kill, the bigger the one you can fish out — so kill the unit that's spent (exhausted, or about to die anyway), not the one you still need. It only looks at five cards, and only a unit up to 1 Might bigger counts.