2007-02-01
If you double a negative life total, you do the real math. A life total of -10 becomes -20.
2007-07-15
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).
2007-07-15
If a Beacon is countered or doesn't resolve, it's put into its owner's graveyard, not shuffled into the library.