Pale Rider of Trostad
Skulk is evasion that inverts the usual rule: instead of dodging small blockers, the creature slips past everything bigger than itself, which makes a 3/3 hardest to answer exactly when the opponent has committed to a fat board. That is the ideal case for this body: a clock the slow, durdly decks can't wall off, since their oversized blockers can't legally step in front of it. The discard trigger is the toll, and it scales the wrong direction for an aggressor. Early, when your hand is full and you want to keep deploying threats, pitching a card stings most; late, when you're topdecking anyway, the cost quietly disappears. That inversion is the whole tension in the design. The creature wants to land on an empty board with a light hand, where its power matters and the discard costs nothing, but on curve it usually arrives when both conditions cut against you. For graveyard-minded black builds the trigger flips from tax to fuel, feeding delirium, threshold-style payoffs, and anything that treats a full bin as an asset. That is the cleanest home for the body: an evasive beater whose entry cost was already going to be paid, strapped to a keyword that punishes precisely the grinding decks a two-drop aggressor usually can't punch through.
