Veil of Secrecy

Evasion plus protection in one combat-step package, sold cheap because it does almost nothing on its own. Granting shroud and unblockability to a single creature reads like a finisher's escort: in an attack step, it pushes a threat through a clogged board while making it immune to a defender's targeted removal, all at instant speed. The splice clause is where the card earns its keep. Bolted onto any Arcane spell for the cost of bouncing a blue creature you control, it appends this evasion-and-protection rider to a spell already on the stack, smuggling extra value into a line rather than spending a card on it. That bounce isn't merely a tax: it doubles as a way to reset a creature's enters-the-battlefield trigger or rescue a threat from a board sweep, so the splice cost itself carries upside in the right shell. Shroud cuts both ways, which is the wrinkle. A creature that can't be targeted by an opponent's removal also can't be the target of its controller's own pump spells or auras for the turn, so the protection is total and indiscriminate. As a standalone trick it is thin, but as a modular rider in a deck built to chain Arcane spells, it is exactly the kind of repeatable, opt-in attachment that splice was built to reward: a small effect that becomes worth its bounce cost only once you stop paying full price for it.