神器 ~武具
当分灵挽具进战场时,派出一个0/0,绿蓝双色的分灵衍生生物。在其上放置X个+1/+1指示物,并将分灵挽具装备于其上。
每当佩带此武具的生物攻击时,将其上的+1/+1指示物数量加倍。
佩带

If you put Fractal Harness onto the battlefield without casting it, or if you choose 0 as the value of X, the token you create will be 0/0. Unless something else is raising its toughness, that token will enter the battlefield and die before you could take any actions.
To double the number of +1/+1 counters on a permanent, put a number of +1/+1 counters on it equal to the number it already has. Other cards that interact with putting counters on it will interact with this effect accordingly.