If you have more than one of these on the battlefield, the cost reduction is cumulative.

You apply cost reduction effects after other cost modifiers, so it can reduce additional costs or alternative costs if they include and/or .

If a spell has hybrid mana symbols in its mana cost, you choose which half you will be paying before determining the total cost. If you choose to pay such a cost with or , Edgewalker can reduce that part of the cost.