Ritual of Subdual

{4}{G}{G}

Enchantment · me2Masters Edition II · #174 · Rare

Enchantment
Cumulative upkeep {2} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
If a land is tapped for mana, it produces colorless mana instead of any other type.