Lightning Mare

Color-pie aggression aimed squarely at one enemy. The unblockable-by-blue clause turns this into a hate-bear that ignores the opponent's flyers, walls, and chump blockers as long as they are casting from the color it was built to punish; against blue defenses it is a clock that simply cannot be stopped on the ground. The uncounterable rider closes the other door: a tempo-blue deck cannot answer it on the stack, so it resolves into a body the control plan has no clean angle on. The firebreathing activation converts that resilience into reach, letting a 3/1 grow into a real threat in the turns where blue is tapped out looking for an answer it does not have. The body itself is glass (one toughness dies to almost anything, which red usually outraces), and that is the bargain: fragile and narrow by design, a deliberately one-sided beater that asks the opponent to be playing the wrong color rather than asking for a favorable board state. Out of that single matchup, the firebreathing is an awkwardly costed pump on a fragile two-drop and the protection riders are dead text; inside it, this is one of the more pointed mono-color punishment cards in the aggressive red tradition, part of the lineage of creatures whose entire identity is "blue cannot interact with me."