Precious Relic

Precious
You may pay {x}{x} instead of corresponding with
any other number associated with a Precious
ability trigger when a permanent you control
with Precious leaves the battlefield. {x} cannot
exceed half your life total. If you do, {x} becomes
the factor pertaining to the Precious ability. If
the permanent leaving play is Precious Relic,
you may activate this ability as it's leaving play.
"Hey guys, look what I found... it's so pr--" Carah
Faye, last words.