Nucleolus

When Nucleolus comes into play if a card called Nucleus is in play equip Nucleolus to Nucleus if possible(this card cant be equipped to any other card.)
give target equipped creature +4/+0
"The nucleolus is located in the center of the nucleus. The nucleolus is responsible for creating ribosomes which than get ejected from the nucleus and settles on the rough ER where the ribosomes are critical
for protein synthesis."