Hummock Golem

Druid Teachings—
Whenever a Golem enters the battlefield add {c}, this mana phases out at the end of your turn.Other Golems you control get +1/+1 as long as Hummock is on the battlefield. When Hummock Golem enters the battlefield put {x} +1/+1 counters on
Hummock Golem for each druid on the battlefield that you control.