Sunfyre the Golden

Flying, Partner (You can have two commanders as long as both have partner)

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.