Nylea's Emissary

The oldest problem with Aura beaters is card disadvantage: attach your enchantment, watch the host die, and lose both halves at once. This Cat sidesteps it by refusing to be only an Aura. Cast it plainly and it is a 3/3 with trample; pay the heavier bestow cost from hand and the same card enters attached, granting +3/+3 and trample, then peels off and reverts to a creature the instant its host leaves rather than following it to the graveyard. That fallback clause converts the usual spike in lost cards into a mere tempo premium: you paid extra mana, not an extra card. Trample runs through both modes, which is the green throughline; granting the keyword to a body that lacked it rewrites how blocks resolve, not just how large the attacker prints, so a chump block no longer stops the damage cold. The choice locks at the moment of casting and is never held in reserve once the spell resolves: you commit to a standalone creature or to an enchantment-with-insurance before the board tells you which one it would have rewarded. That commitment is what keeps the dual-mode design fair, and it is why bestow reads as safe to run when a raw Aura at the same rate would not.