If this card and "Marauding Captain" are together on the field, the opponent will be unable to attack either of them.
"Marauding Captain" is also a great way to Synchro Summon this card. Use its effect to Special Summon a Level 2 Tuner from your hand
This is also possible by controlling 2 copies of this card.
Combine this card with "DNA Surgery" to change your monsters to Warrior-Type, and thus protect them all. If you have two copies of this card (Or "Marauding Captain"), you can combo it with a "Tyrant Neptune" and a high-ATK Warrior such as "Gilford the Lightning" for a very tough to break offensive shield. Not the most efficient use of "Neptune", but very handy if you're running a primarily Warrior-based deck.
Another way to use this card's effect is with "The Dark Door". If this card is in Defense Position it cannot be destroyed by battle, so its controller won't take damage except through piercing.
With "Number 39: Utopia", both these monsters and other Warrior-Type monsters can become very hard to destroy by battle. This card keeps attacks and Monsters like "Ally of Justice Catastor" and "Neo-Spacian Grand Mole" away from "Utopia" and other Warriors; "Utopia" can block any would-be fatal attacks to this card along with the aforementioned "Catastor" and "Grand Mole", and this card protects "Utopia" from its own self destruction effect when its own materials run out. Combine with "Scrap-Iron Scarecrow" and a continous Burn card for extra Stall power.