Purphoros's Emissary

A 3/3 with menace for four mana is a competent body; the reason this card is built the way it is lies in the seven-mana line most players never actually cast on curve. The oldest Aura problem is losing both cards to one removal spell: enchant a creature, watch it die, and you have spent two cards to end up with nothing on the board. Bestow answers that by letting the same card be either an Aura or a creature depending on what the board demands, and the crucial wrinkle is what happens when the host dies. A normal Aura follows its creature to the graveyard; bestow specifies the card becomes a creature again instead, so the +3/+3 and menace you grafted onto an attacker survive the trade that would have cost you the enchantment. That persistence is the entire justification for the premium. The menace grant is the point of the pairing rather than a bonus: your buffed threat demands two blockers, and it keeps demanding them through the removal that would have picked off a smaller attacker. The distance between the four-mana creature and the seven-mana enchantment is the tension the design rests on. The card plays as a midrange body that quietly stores a finisher inside it for the late game, a modest, honest expression of bestow's promise: an Aura that refuses to blow you out, and asks you to pay for the privilege.