{T}: Change the text of target white enchantment you control that doesn t have cumulative upkeep by replacing all instances of one color word with another. (For example, you may change black creatures can t attack to blue creatures can t attack. ) That enchantment gains Cumulative upkeep {1}. (At the beginning of its controller s upkeep, that player puts an age counter on it, then sacrifices it unless they pay its upkeep cost for each age counter on it.)