Taii Wakeen, Perfect Shot

Most damage payoffs care about how much you deal; this one cares about precision. The draw trigger fires only when a source you control deals noncombat damage to a creature exactly equal to its toughness: not more, not less, but the killing blow measured to the point. That "equal to" clause is the whole tension. It rewards you for reading the board math and punishes overkill, so a ping that would kill a 1/1 pays a card only when the toughness lines up on the nose. The activated ability exists to make that math reachable: paying X adds to the noncombat damage a source you control would deal to its target this turn, letting you tune a Shock or a tapper's ping up to whatever toughness you need to hit exactly. The two halves feed each other. The pump sets up the number the trigger wants, and the trigger pays you back for landing it. This is burn-as-engine rather than burn-as-reach, asking a red-white deck to treat damage as a resource spent precisely instead of a hammer swung at faces. It hangs a card-draw engine on an unusual axis, board reading, and it is a demanding one to pilot: overkill that would end a game elsewhere here simply wastes the trigger, and the pump ability is as easily used to overshoot as to hit the mark.