Violet Lotus Cloak

At the beginning of your upkeep, if your
commander is in the command zone, you may
put a storage counter on target land. Lands you
control have: ''{t}, Remove X storage counters:
Add X colorless mana. If X is greater than 5, you
may instead add X mana of any combination of
colors. Spend this mana only to cast your
commander.''