Finding cards that fit a deck

Two ways to start

• From a deck. Pick one of yours and it works from everything in it. Best once a deck has a shape.
• From a few cards. Build a quick list of two or three cards instead. Better at the very start, when you have an idea and a commander and nothing else, and a whole deck would drown the signal.

What it means by fitting

Five things, each scored, and knowing which is which is what makes the sliders useful rather than mysterious:

• Keyword overlap. Cards sharing mechanics with what is already there. Finds the obvious partners.
• Tribal match. Creature types the deck already leans on. Turn this up for a tribal deck and down for anything else, or every suggestion becomes a creature.
• Colour fit. How well it sits in the deck's colours. Worth keeping high for Commander, where being off-colour makes a card illegal rather than just awkward.
• Curve fill. Favours costs the deck is short of. Useful late in building, when the shape is right but the curve has a hole at three.
• Type balance. Nudges towards whatever the deck is light on, usually removal or card draw.

Using the sliders properly

The default weighting is a reasonable general answer, and a general answer is rarely what you want. Push one slider to the top and the rest down, and read the list as the answer to that one question.

• All the way to curve fill to answer "what fills the gap at three mana".
• All the way to tribal to answer "what else do I own for this tribe".
• All the way to type balance when a deck feels like it never has an answer to anything.

Reading four narrow lists tells you more than one broad one, and takes about the same time.

It only suggests what you own

This is the point of it. Suggestions you cannot act on without buying something are what every other tool gives you; these are cards sitting in a box in your house. Add one straight to the deck from here.

If you want suggestions from every card ever printed rather than from your shelf, that is a different job, and searching by card text will serve you better.

What it will not do

It scores what can be measured: mechanics, types, colours, costs. It does not know that two cards combine into something the rules did not intend, or that a card is quietly banned in your playgroup. Treat the list as a reminder of what you own rather than as advice, and the tool earns its place.