Aragorn, Hornburg Hero (LTC 536)

Legendary Creature — Human Soldier • Mana cost: {1}{R}{G}{W} • Tales of Middle-earth Commander • Mythic

Attacking creatures you control have first strike and renown 1. (When a creature with renown 1 deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
Whenever a renowned creature you control deals combat damage to a player, double the number of +1/+1 counters on it.

Illustrated by Jason Rainville.