Bargaining Treefolk

Vanishing 5 (This creature enters the battlefield with
five time counters on it. At the beginning of your
upkeep, remove a time counter from it. When the last
is removed, sacrifice it.)
{3}, Choose a number secretly between one and
five: Ask a player outside of your game to name a
number between one and five. If the numbers
are the same, gain 5 life and draw a card. Any
player in a game of Magic: the Gathering can
activate this ability.