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Its as if the designers tried to say: Hey, if youre bad at deck-building, heres at least some extra health for you. A good deck utilizes mana very accurately, and you almost never should end up with excess mana, unless something totally unexpected happens
It also gives the equipped creature +1/+0 to boot, which is a nice little bonus to make up for the lack of protection from the low ward cost
Quirion Ranger Quirion Ranger is a fantastic ramp piece in decks with mana dorks
as such, both should be included in decks that want a consistent mana base