it counts as 0 mana, look at pounce
besides what Raywen said druids usually fight from behind, while shamans have minion pressure removal and token genraation that pushes them ahead of the opponent, that’s why their buff spell needs to cost more, or else they would have a much quicker victory not allowing the defender to fend off the aggressor, btw, you know what the power turns of both classes are? in aggro/token decks, of course, for druid the best power turns were turn 4-5 and 8, while for shaman the power of the plays made would decrease after time from turn 1 to 8
member mage and priest? I member