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But despite the emphasis on spells costing four mana or more, I think that the most aggressive versions of UR are the most powerful ones, especially if youre not splashing in other colors

Main Collectable Card Games Magic: The Gathering Birds of Paradise (Paradise Chocobo) Birds of Paradise (Paradise Chocobo) Casting Cost: Card Type: Creature - Bird Card Text: Flying : Add one mana of any color

This will help you reliably cast your spells while ensuring you have enough cards to complete your deck

An Aura put onto the battlefield this way doesn't target anything (so it could be attached to a permanent with shroud, for example), but the Aura's enchant ability restricts what it can be attached to