Dazzling Aurora

Card textAt the end of your turn, reveal cards from the top of your Main Deck until you reveal a unit. Play it, ignoring its cost, and recycle the rest.

Nine Energy up front, then a free unit every turn for the rest of the game. It fires at the end of your turn, so the unit it plays is there to defend on theirs — play it to a battlefield you control and it guards that battlefield. Know what's on top of your deck: it only stops at a unit, and everything it skips goes to the bottom.