Erkenbrand, Lord of Westfold

Whenever Erkenbrand, Lord of Westfold or another
Human enters the battlefield under your control,
creatures you control get +1/+0 until end of turn.
"Amid them strode a man tall and strong.
His shield was red. As he came to the
valley's brink, he set to his lips a great
black horn and blew a ringing blast."