This is my first card idea (first post even
)...
Soul-Capturer - Entorpy - X Entropy quantums
Spell
Ability: Capture - When the target creature dies, you get as much quantums as the creature costed divided by 2. X equals as much quantums as the target creature costed - 2 (can't get below 1).
Improved version
Soul-Saver - Entropy - X Entropy quantums
Spell
Ability: Capture - When the target creature dies, you get as much quantums as the creature costed. X equals as much quantums as the target creature costed -3 (can't get below 1).