Vigil for the Lost #26
Market Price
Raw
$0.13
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Card Details
Whenever a creature you control dies, you may pay 
. If you do, you gain X life.
“"As she grew cold in my arms, I swore an oath that her funeral pyre would be dwarfed by a bonfire of our enemies."”
Illustrated by Igor Kieryluk
Rulings (1)
Jan 1, 2011
As the ability resolves, you choose a value for X and decide whether to pay . If you do decide to pay , it's too late for any player to respond since the ability is already in the midst of resolving.