Adriana, Captain of the Guard (C20 200)

Legendary Creature — Human Knight • Mana cost: {3}{R}{W} • Commander 2020 • Rare

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)
Other creatures you control have melee. (If a creature has multiple instances of melee, each triggers separately.)

Illustrated by Chris Rallis.