Going a little bit off of what @oranos said (mainly focusing on legendaries, will probably edit or comment later for the rest of the core set):
- I think you should either change the name of either the minion type Parasite or the keyword Parasite, as it can be hard to differentiate between the two with some of your cards.
- I feel like your Grandmaster should focus more around either your general or the enemy general with its effect. Whie you do this somewhat to an extent, I think the effect on the general should be more direct (aka revolves directly around a general without requiring minions like Parasites on the board)
- Parasite Quasar should have less stats (5/5?) and only target one enemy minion, since it can essentially act as a continuous removal if unanswered AND already has an immediate impact on the board if the opponent has a minion.
- I would really consider streamlining the stats of the Planet tokens. While I like the scale in cost and stats, I think it would be much better if all the planets had the same stats but their ability involved a number that scaled with the planet (ex: all the tokens could be 3/3s but maybe each planet summons a certain # of parasites on random tiles when they die).
- I really do not like the design of the Old God, I believe it limits the design space of Vortex Hyperwarp cards too much
- I think Parasite Universe should be a spell (You currently have 5 legendary minions, 1 spell, and 1 artifact)
- I feel like Antimatter Railgun should just have the same effect as Mortar-Maw for simplicity


