I couldn't find a topic for this already. This looks to have a Slay the Spire feel to it, and it's by one of my favourite devs, Klei - they of Don't Starve and Mark of the Ninja fame.
Currently only available in Alpha via the epic game store (on sale for under a UK tenner at the moment), but if you buy it there you will get a free Steam key when it launches in early access this June. The price is due to rise on the 1st May, going up by 5 £/$ by the looks of it.
Has anyone tried it yet?