Special Summon it, also all "War Rock" monsters you currently control gain 200 ATK until the end of your opponent's turn, also for the rest of this turn, you cannot attack directly with Level 5 or lower monsters
It also gives +2/+2 , which is decent but on the low end for a mid-priced card
Further reading [edit] External links [edit] Media related to Collectible card games at Wikimedia Commons

Advanced Search Sets Random Syntax Aura Barbs Barrel Down Sokenzan Blazing Shoal Blessed Breath Blind with Anger Call for Blood Candles' Glow Charge Across the Araba Choice of Damnations Cleanfall Consuming Vortex Crack the Earth Cranial Extraction Crushing Pain Cut the Earthly Bond Dampen Thought Dance of Shadows Death Denied Death of a Thousand Stings Desperate Ritual Devouring Greed Devouring Rage Disrupting Shoal Eerie Procession Ethereal Haze Evermind Eye of Nowhere Feast of Worms First Volley Footsteps of the Goryo Gaze of Adamaro Glacial Ray Goryo's Vengeance Heed the Mists Hex Magic Hideous Laughter Horobi's Whisper Hundred-Talon Strike Ideas Unbound Inner Calm, Outer Strength Into the Fray Ire of Kaminari Joyous Respite Kodama's Might Kodama's Reach Lava Spike Lifted by Clouds Murmurs from Beyond Nourishing Shoal Otherworldly Journey Overblaze Part the Veil Path of Anger's Flame Peer Through Depths Petals of Insight Plow Through Reito Psychic Puppetry Pull Under Pure Intentions Quiet Purity Reach Through Mists Rend Flesh Rending Vines Reweave Ribbons of the Reikai Roar of Jukai Shifting Borders Shining Shoal Sickening Shoal Sift Through Sands Sink into Takenuma Soulless Revival

Its 1 dollar a Card for my time or just go buy it off TCG or EBay dont waste my time this is for serious collectors not resellers
The exception is in knights decks in EDH, especially Haakon, Stromgald Scourge, which can get you the Knight back when you need it