Black Swan
Activate: Until the end of next turn, your 1-Cost cards cost 0.
Corvus Glaive
On Reveal: Discard 2 cards from your hand to get +1 Max Energy.
Cull Obsidian
You can only play this where you have a 1-Cost card.
Proxima Midnight
When this is discarded, jumps to your lowest-Power location. (that isn't full)
Supergiant
On Reveal: All cards played next turn don't reveal until the game ends.