Aqueous Formevasion$0.40Like Cloak of Mists, it makes a creature effectively unblockable and helps push damage through. It adds scry for a bit more value at the same general role and cost.
Whispersilk Cloakevasion$2.74Gives unblockability like Cloak of Mists, but also adds shroud for protection. It is a common functional upgrade if you want the creature to connect safely.
FlightevasionBudget$0.12A simple Aura that grants evasion, helping a creature get around blockers. It is weaker than unblockable, but plays a similar role in pushing combat damage through.
Artful Dodgeevasion$0.52This provides temporary unblockability to a creature, fulfilling the same combat-pushing function. It is a spell rather than a permanent Aura, but often serves the same purpose.
Slip Through Spaceevasion$11.23Another cheap way to make a creature unblockable for a turn. It also replaces itself, making it a strong budget and tempo-friendly alternative.
Shadow Riftevasion$1.66Grants unblockability for a turn and replaces itself with a card draw. It is a very efficient way to force damage through, similar in game plan to Cloak of Mists.
Psychic ImpetusevasionBudget$0.09This Aura makes a creature harder to profitably block by goading it into attacking elsewhere, though it is not true unblockability. It fits an aggressive evasive role in blue enchantment shells.
Coastline ChimeraevasionBudget$0.03Not an Aura, but it can grant flying to a creature repeatedly, which is a comparable evasion plan. It is a slower but flexible way to make one threat hard to block.