Tools - Flesh and Blood FAB

How many cards you burn to pay for the turn
Put in the deck, the hand and what each kind of card pays, to see how many cards funding the turn costs you and how many are left to actually play with.

When the card you put underneath comes back
Put in the deck size, what you draw and what you put underneath each turn, to see the exact turn a card comes back and why holding it one more turn often changes nothing.