Modular

Modular is a keyword ability that allows artifact creatures to come into play with a number of +1/+1 counters, and put those counters on another artifact creature when the creature goes to a graveyard. Modular appeared in the Darksteel and Fifth Dawn sets.

From the ()

Rulings

• If an Arcbound creature gets enough -1/-1 counters to make its toughness 0 or cause the damage on it to now be lethal, the Modular ability will still give another artifact creature a number of +1/+1 counters equal to the number the Arcbound creature had before it got -1/-1 counters.

Reminder text

The latest reminder text for modular reads "This comes into play with N +1/+1 counters on it. When it's put into a graveyard, you may put its +1/+1 counters on target artifact creature."