This isn't an original idea to abuse unleash, but I have taken it in a different direction than the other decks posted so far.
Much credit to Makash and psly4mne for starting this train of thought.
I originally made this as a gantlet deck, but have trouble getting past the final boss with a win rate of about 50%, but it works in Throne also. I don't know how it would do in diamond, but below that it works OK and the fun of filling a board on Turn 5 is priceless.
This is a deck I made to try to abuse unleash with
Valley Whisperer and low cost units.
Journey Guide and
Tempting Offer reduce your units while
Dinosaur Nest makes all of these low cost dinos free and powerful.
Broken Contract can fill your board easily even when you had nothing in hand.
Dawnwalker and
Valley Whisperer have a fun interaction. When Dawnwalker is played from the void, each copy unleashes itself and when the extra ones go to the void, They are ready to be called out next turn.
The deck needs more relic hate.