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{T}: For each color among permanents you control, add one mana of that color.
Bloom Tender can’t add colorless mana to your mana pool, even if you control a colorless permanent.
Bloom Tender won’t add more than one mana of any particular color to your mana pool. At most, it will produce {W}{U}{B}{R}{G}.
For each color (white, blue, black, red, and green), check to see if you control a permanent of that color. You can count the same permanent for multiple colors. For example, if you control a green enchantment and a white-black creature, Bloom Tender’s ability produces {W}{B}{G}.
