Instant, 5W (6)
Rare
Double target player's life total. Shuffle Beacon of Immortality into its owner's library.
The cave floods with light. A thousand rays shine forth and meld into one.
Illus. Rob Alexander

2/1/2007: If you double a negative life total, you do the real math. A life total of -10 becomes -20.
7/15/2007: Beacon of Immortality's effect counts as life gain (or life loss, if the life total was negative) for effects that trigger on or replace life gain (or life loss).
7/15/2007: If a Beacon is countered, it’s put into its owner’s graveyard, not shuffled into the library.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern