From reading the card text, "Until end of turn, any time you could activate a mana ability, you may pay 1 life. If you do, add Waste (colorless)." I have played a few games where players are able to use this spell to cast any spell, using their life to cast said spells, even though their mana cost does not include the Waste (colorless). Can someone explain this to me? How is it possible to use this card to cast their Commander, then cast abilities that require a Colored mana to activate.. I understand being able to use this card to cast Eldrazi, but how is it possible to cast other cards that require a colored land to cast? Thanks.