Everpiercing Arrow

Triumph (At the beginning of your end step, if
creatures opponents control have five or more -1-1
counters, you get Triumph for the rest of the game.)
At the beginning of your upkeep, you may put a
-1-1 counter on target creature.
As long as you have Triumph, Everpiercing arrow
has "{1}{b}{b}{t} Double the amount of -1-1
counters on target creature."