Tessaiga, Fang Reforged

At the beginning of combat on your turn, put a
charge counter on Tessaiga, Fang Reforged.

Equipped creature gets +1/+1 for each counter
on Tessaiga, Fang Reforged.

As long as Tessaiga, Fang Reforged has four or
more counters on it, equipped creature has
double strike.

Equip—Pay {3} or remove a counter from
Tessaiga, Fang Reforged.