Divine Wildflower

During your end step, put X shield counters on Divine
Wildflower, where X is the amount of untapped lands or unspent mana. If Divine Wildflower has 20 shield counters or more, it becomes a 10/10 angel with flying and trample.

Remove 1 shield counter, {t}: Add two mana of any color.

Remove 3 shield counters, {t}: Put two shield counters on two other permanents you control.

Divine Wildflower can be your commander and receives noncombat damage.