tiltadra, wrapper of worlds

trample
tiltadra enters the battlefield with X +1/+1
counters on it, where X is three times the total converted mana cost among permanents you control.
{1}: remove three +1/+1 counters from tiltadra.
any player may activate this ability.
at the beginning of your upkeep, double the
number of +1/+1 counters on tiltadra.