Forth Eorlingas!

Creatures you control have flanking until end of turn. (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)
"Arise now, arise, Riders of Theoden!
Dire deeds awake, dark it is eastward.
Let horse be bridled, horn be sounded!
Forth Eorlingas!"
- King Theoden