Captain Cold and Superman - What are we paying?

[normalview]

For reference:

Captain Cold: Leonard Wynters
While Captain Cold is active, your opponent must pay 1 to declare an attack.

Superman: Man of Steel
When fielded, you may pay 2 to purchase a different character with the Justice League affiliation and put the die directly into your bag.

Neither card indicates what exactly we are to pay. Energy or life? And if it is energy, is it generic or a specific kind?

Thanks!

[dmrulesteam]

Both refer to energy, see this post: viewtopic.php?f=10&t=5984

-The Dice Masters Rules Team