Sigismund, Templar Master

Vigilance, first strike
At the begining of your upkeep, have Sigismund
fight target legendary creature. He gains +2/+1 and
double strike until end of turn
As long as Sigismund is equipped, he has double strike, hexproof and protection from red and black
{2}{w}{u}{t}: destroy target legendary creature or planeswalker
"Zeal makes all things possible, duty makes all things simple."