The Namekian Dragonballs

When The Namekian Dragonballs enter, draw
a card and put a dragonball counter here.
Whenever a creature deals combat damage to
you, its controller gains control of The
Namekian Dragonballs, draws a card, and puts
a dragonball counter here.
At the beginning of your end step, if there are seven dragonball counters here, transform the Namekian Dragonballs.