Interfaces & game design (help appreciated)

Hello there,
I'm creating a multiplayer (MLAPI) Trading Card Game and I'm facing a problem with designing the card specific custom scripts.

At the moment card specific scripts (attached to every card and responsible of for example checking if card can attack or played as resource) derive from ICard interface which defines all these necessary methods. It seems like interface is useful here, cause every script's name is different (name of the card) and I have to attach the script and access it's methods (I cannot GetComponent<variable>() in runtime but it works when using interfaces) in runtime.

Well, my current headache comes from it seems like I cannot use virtual methods when inheriting form Interface.

Cause there are hundreds of cards and tens of methods (that are 90% of the time default) and I would like to define them as virtual in one place and then just override if there is a special case.

Do I make myself clear? Does anyone have an idea how to solve this problem effective without having to repeat too much code?

 

Why not use abstract class

 

Thank you for a prompt answer. Abstract classes solve the inheritance issue but I don't know if I can access a method in abstract class when I have to use a variable as the name of the component? For example how:
string scriptName;
c.gameObject.GetComponent<scriptName>().IsSacrifisable();

 

No need to save component name
public abstract class CardBase : MonoBehaviour
{
public abstract IsSacrifisable();
}
GetComponent<CardBase>().IsSacrifisable();

 

So it works just like with interfaces. Great! Thank you