Training Grounds

Training Grounds reduces the generic mana in waterbend costs for activated abilities. It will not reduce waterbend costs that are additional costs for casting spells.

Training Grounds can reduce the part of an activation cost represented by generic mana symbols down to nothing, as long as it still costs at least one mana. For example, if an activation cost is 2 generic mana green mana , you'd have to pay only green mana . If an activation cost is 2 generic mana , though, you'd still have to pay 1 generic mana .

Training Grounds can reduce the amount you pay for a creature's activated ability cost that includes X generic mana . For example, Drana, Kalastria Bloodchief has an activated ability that costs X generic mana black mana black mana . If you control Training Grounds and you activate the ability with X equal to 5, you'll have to pay only 3 generic mana black mana black mana . This is true even if the ability states that X generic mana must be paid with a certain color of mana, as Crimson Hellkite's ability does.