O'Shovah, Legendary Pariah

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.

"...though he fights with a rare fury, he never wastes
a single T'au life."