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.)