Idea for Quest mode: Alchemist

I have an idea for Quest mode. I'm willing to implement it, although I'm a bit rusty on Java
I just wanted to know who or how do you guys decide what new ideas can have a go.
Idea: The Alchemist uses a predetermined set of rules to consume cards and generate a new card. For instance:
X Mythics + fee -> 1 new Mythic
Y Planeswalkers + fee -> 1 new Planeswalker
Z cards of same color + fee -> 1 new card of same color
Really difficult recipe + (a large amount of fee) -> 1 Any card you want
- The recipes would be stored on a xml/txt file so that new recipes can be easily added later
- For balance reasons, the access to it would need a new bazaar item and therefore a cost
- The recipes and prices themselves would be discussed on the community, so it feels just right: neither too cheap nor too expensive
- Alchemy Advanced Study 1: Bazaar item that allows you to choose one of two different outputs
- Alchemy Advanced Study 2: Bazaar item that allows you to choose one of three three different outputs
- Alchemy Advanced Study 3: Bazaar item that allows you to transmute again the same recipe for an increased price
What do you guys think?
I just wanted to know who or how do you guys decide what new ideas can have a go.
Idea: The Alchemist uses a predetermined set of rules to consume cards and generate a new card. For instance:
X Mythics + fee -> 1 new Mythic
Y Planeswalkers + fee -> 1 new Planeswalker
Z cards of same color + fee -> 1 new card of same color
Really difficult recipe + (a large amount of fee) -> 1 Any card you want
- The recipes would be stored on a xml/txt file so that new recipes can be easily added later
- For balance reasons, the access to it would need a new bazaar item and therefore a cost
- The recipes and prices themselves would be discussed on the community, so it feels just right: neither too cheap nor too expensive
- Alchemy Advanced Study 1: Bazaar item that allows you to choose one of two different outputs
- Alchemy Advanced Study 2: Bazaar item that allows you to choose one of three three different outputs
- Alchemy Advanced Study 3: Bazaar item that allows you to transmute again the same recipe for an increased price
What do you guys think?