Riftbound Unit: Shipyard Skulker.
Riftbound Unit: Undertitan. When you play me, give your other units +2 [S] this turn. As I'm revealed from your deck, [Add] [2].
Riftbound Spell: Tactical Retreat. [Reaction] (Play any time, even before spells and abilities resolve.) Choose a friendly unit. The next time it would die this turn, heal it, exhaust it, and recall it instead. (Send it to base. This isn't a move.)
Riftbound Unit: Jayce, Man of Progress. When you play me, you may kill a friendly gear. If you do, you may play a gear with Energy cost no more than [7] from hand this turn, ignoring its Energy cost.