For instance, a card may require a Lore -1 roll.

And how do I know which cards require a disk controller?

Some cards may require their owner to pay mana of two or more colors.

Certain cards require that an action being taken when played.

While some cards for students require a parent to cosign, many do not.

These cards require only proximity to an antenna to communicate.

To help reduce cost for mass production, a card may only require the traces on one side (pins 1 to 85).

The more comprehensive cards also require more of a teacher's time.

These cards require only close proximity to an antenna to complete a transaction.

But the secured cards require a money deposit as collateral.