Yennett, Cryptic Sovereign

A single arithmetic constraint sits at the center of this design, and it's a strange thing to build a deck around: reveal the top card on attack, cast it free if its mana value is odd, draw a card if you don't. Odd converted mana costs are the natural home of white-blue-black's best expensive spells, so the payoff isn't in the low curve; it's in stacking the deck with five-, seven-, and nine-cost bombs and letting a 3/5 flier cast them for free. The trigger fires the moment she's declared as an attacker, which is what makes the evasion suite load-bearing: it isn't about surviving the block or getting damage through, it's about being allowed to attack every turn without hesitation. Vigilance means the swing never strips a blocker, and flying stacked with menace makes a single wall useless against her, so the attack step becomes something you commit to on autopilot rather than a risk you reweigh each turn. The build-around cost is self-imposed: to make the reveal hit, you warp your entire mana curve toward odd numbers, cutting the two- and four-drops that would otherwise smooth your early turns. This is a puzzle-box design, constructed backward from a numerical restriction rather than from the usual synergy webs, and it asks a question most cards never do: what does your deck look like when every card in it is odd?